Clara wrote the following hypothesis for an experiment about acidophilic bacteria.

Bacteria cells will stop dividing in a basic (alkaline) environment because of the high pH.

Which statement is the best way to restate the hypothesis so that it is more specific?
Growing acidophilic bacteria in some environments will cause the cells to stop dividing because of pH.
If the pH of their environment is changed, acidophilic bacterial cell division will be affected.
If the environment of acidophilic bacterial cells becomes alkaline, the bacteria will stop dividing.
The more alkaline an environment, the less cell division will occur in bacteria.

Please help :)

Answer:

Explanation:

__3__ Anton van Leeuwenhoek observed small organisms he called “animalcules.”

___2___ Robert Hooke was the first to use the word “cell.”

___4___ Matthias Schleiden theorized that plants are made of cells.

___5___ Theodor Schwann theorized that animals are made of cells.

___1___ Hans and Zacharias Janssen created the first microscope.

___6___ Rudolf Virchow theorized that cells come from other pre-existing cells

Answer:

Answer:

true

Explanation:

1. Magnitude measures the energy released by the earthquake, while intensity measures its duration. The correct option is A.

2. The conclusion you can draw between the two conditions is that there is more likely to be an earthquake in a "highest hazard" location than in a "lowest hazard" location and is denoted as option A.

3. P waves travel fastest and are the first to arrive from the earthquake. In S or shear waves, rock oscillates perpendicular to the direction of wave propagation. In rock, S waves generally travel about 60% the speed of P waves, and the S wave always arrives after the P wave.

4. Seismographs are instruments used to record the motion of the ground during an earthquake. They are installed in the ground throughout the world and operated as part of a seismographic network.

In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. As such, it generalizes a circle, which is the special type of ellipse in which the two focal points are the same.

Maybe they might use that math thing for Science.

Answer:

abiotic sand sunlight water currents

biotic fish bacteria jellyfish

pretty sure this is right

because biotic is living and abiotic is nonliving

Answer:

A cytoplasm is a fluid inside a eukaryotic cell that contains fluids and other molecules. Most of a cell's water is in the cytoplasm. It has a colorless look.

Answer:

There could be several possible reasons for a small gap between rails on a railway track, such as:

1. Expansion joints: Railways are designed to allow the tracks to expand and contract with changes in temperature. To accommodate this expansion, small gaps are left between the rail ends and filled with expansion joints or plates.

2. Wear and tear: Over time, the rails may experience wear and tear due to heavy loads, weather conditions, and other factors. As a result, small gaps can appear between the rails.

3. Maintenance: During maintenance activities, rail tracks may be adjusted or replaced, which could lead to small gaps between the rails.

4. Environmental factors: Environmental factors such as soil shifts, earthquakes or other natural disasters can also affect the alignment of the rails, leading to small gaps.

These are some of the possible reasons for a small gap between the rails on a railway track.

Answer:

The small gap left between the rails in a railway track is intentional and serves a specific purpose. This gap is known as the rail joint, and it allows for the expansion and contraction of the rails due to changes in temperature. When the temperature changes, the metal rails will expand or contract, and if they were joined together tightly, they could buckle or become deformed, which could be dangerous for trains passing over them. The rail joint allows the rails to move slightly and prevent damage to the track.

Additionally, the rail joint also allows for maintenance and repairs of the track. If there were no gap between the rails, it would be challenging to replace a damaged rail or perform routine maintenance, such as tightening bolts or lubricating joints. With the rail joint, maintenance personnel can easily access and work on the track.

Overall, the small gap left between the rails in a railway track is intentional and serves a crucial function in ensuring the safety and reliability of the track.

Answer:

C

Explanation:

Weather is what is happening at one point in time

Answer:

C.

Explanation:

The atmosphere changes everyday and that is what makes the weather cold or warm.

Answer:b

Explanation:

Answer:

Q1 part D Q2 part B

Explanation:

After the chemical reaction, the things that you get are known as products.

The chemical reactions are generally of many types. The exothermic and endothermic reactions are important among them. In an exothermic reaction the chemical energy is converted to thermal energy. The correct option is 1.

The chemical reactions which proceed with the evolution of heat energy are defined as the exothermic reactions. The chemical reactions which proceed with the absorption of heat energy are called endothermic reactions.

In an exothermic reaction, system loses heat to surroundings. Since heat is given out in exothermic reactions, the enthalpy of the products will be less than that of the reactants.

In exothermic reaction, q will be negative and the enthalpy change will be also negative. In this reaction  chemical bonds are broken and new bonds are formed. The chemical energy is converted to kinetic energy which is released as heat.

Thus exothermic reaction releases thermal energy.

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Answer:

A. The tendency of an object to stay at rest or in motion.

Explanation:

Interna makes stuff stay on motion or in place.

Answer:

the tendency of an object to stay at rest or on motion

Observation: The man is walking his dog.

Interference: The dog must have saw something and started chasing after it, resulting in the owner being dragged along.

Observation: The man is walking his dog.

Interference: The dog must have saw something and started chasing after it, resulting in the owner being dragged along.

HOPE IT HELPS

Answer: It stabilizes the Earth's climate system

Explanation:

1. print fossil

2. carbonized fossil

3. petrified fossil

4. cleavage

5. landform

6. igneous

7. metamorphic

8. print fossil

9. geology

10. sedimentary

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The print fossil, original-remains fossil, petrified fossil, carbonized fossil, landform, igneous, metamorphic, sedimentary, cleavage, and geology are the respective matches as given in the question.

Print fossil is imprint of plant or animal and basically known as fossil impression. Original-remains fossil comprises of the original tissues and parts of  organism and undecayed plant or animal part. Petrified fossil is replaced by a mineral. Carbonized fossil is only carbon remains. Landform is a mountain. Igneous is from magma.

Metamorphic is from physical and chemical changes. Sedimentary rocks are sandstone. Cleavage helps to identify rocks. Geology is the study of science of earth.

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Answer:

convection: the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise and colder, denser material to sink under the influence of gravity which consequently results in the transfer of heat.

radiation: the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cauwe ionization.

Answer:

39

Explanation:

Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.

Answer:

nothing is here

Explanation:

Answer:CH4(g) + 2O2(g) →2H2O(l) + CO2(g)

Explanation: CH4 is dioxide and water. So basically whats happening here is that CH4 is being burned down

Since hydrocarbon fuels only contain two elements, we always obtain the same two products when they burn.

Answer:

CH4(g) + 2O2(g) →2H2O(l) + CO2(g)

and it is the chemical reaction that makes it yellow

Explanation:

its obvious

1. phototropism

2. geotropism

3. tropism

4. biome

5. symbiosis

6. cortex

Answer:

The answer is C.

Explanation:

Please give brainliest

Answer:

D

Explanation:

complex, in chemistry, a substance, either an ion or an electrically neutral molecule, formed by the union of simpler substances (as compounds or ions) and held together by forces that are chemical (i.e., dependent on specific properties of particular atomic structures) rather than physical.

Answer: nucleus  

Explanation:

Answer:

1. 2 valence electrons 2. 1 valence electron

Explanation:

valence shell is the elctrons present on the outer most shell

Answer:

Bonds can be placed on a scale that ranges from 100% ionic to 100% covalent.

CO2: CO2 is a covalent compound, with each carbon atom sharing electrons with two oxygen atoms. Therefore, it can be placed closer to the 100% covalent end of the scale.

N2: N2 is a covalent compound, with each nitrogen atom sharing electrons with another nitrogen atom. Therefore, it can be placed closer to the 100% covalent end of the scale.

NaF: NaF is an ionic compound, consisting of a sodium cation (Na+) and a fluoride anion (F-). Therefore, it can be placed closer to the 100% ionic end of the scale.

H2O: H2O is a polar covalent compound, with the hydrogen atoms sharing electrons with the oxygen atom, but the electrons are not shared equally, therefore the oxygen atom has a partial negative charge and hydrogen atoms have a partial positive charge. Therefore, it can be placed closer to the middle of the scale, between ionic and covalent.

Overall, the scale can be represented as follows:

100% Ionic <-------> NaF <-------> H2O <-------> CO2 <-------> N2 <-------> 100% Covalent

Answer:

I think it is B.

Explanation:

The erosion of the sand and soil from the shoreline would be a direct result of humans building along the ocean shore zone. When humans build structures along the shoreline. This can lead to increased erosion of the shoreline and loss of the beach.

Building along the ocean shore zone can have several impacts on the natural environment. One of the direct impacts is the erosion of the sand and soil from the shoreline. This occurs because construction can disrupt the natural processes that maintain the beach, such as the movement of sand and the protection provided by vegetation.

For example, building seawalls or other structures can prevent the natural movement of sand and sediment along the beach. This can lead to erosion of the shoreline, as the sand is no longer able to accumulate in areas where it is needed to protect the shoreline. These plants help to hold the sand in place and protect the beach from erosion.

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Answer:

is the correct

pls mark me as brainliest pls  

Answer:

Mechanical waves require a medium to travel through, whereas electromagnetic waves can travel through empty space.

Explanation:

Edge