I need science fair project ideas. I am in 9th grade. project has to have a independent and dependent variable

Answer:

Hmm. Here's my answer:

When this happens, they (the chromosomes), condense. And for the nucleolus, that disappears, while the nuclear envelope breaks down.

Answer:

I didn't see the video but global warming might be one.

Explanation:

Due to global warming the polar ice caps are melting, so that means a decrease in the food a polar bear might have.

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An ice age caused Earth’s oceans to cool, which killed many of the unicellular organisms. When the ice age ended and Earth warmed, the continents broke apart. This event allowed the shallow seas to cover the continents. The warming of Earth, accompanied by the seas covering the land, created the proper conditions for multicellular organisms to form.

Explanation:

This is the exact answer on Edmentum so I advise that you do not copy and paste this answer.

Answer:1B 2.D 3.D 4.C 5.D not sure about 4 and 5 but the rest are right

Explanation:

Answer:

(Not using letters as they vary)

1. Skin cells...

become senescent quickly.

2. Which type of cell undergoes terminal differentiation?

Heart cells

3. DNA replicates in the...

Nucleus

4. Which of the following might affect gene expression in a complex organism?

The types of cells near the site

5.  What replicates during mitosis?

cells

Explanation:

Hope this helps :D

Answer:

false

Explanation:

if the fulcrum is closer to the load, it is esier and requires less force.

Answer:false

Explanation:A lever is a simple machine that is used to lift or move heavy loads by use of relatively smaller forces. It uses a fixed support or hinge known as a fulcrum.

Answer:

There are 1000 calories in 1 Calorie (notice the difference in the capital C) on our food labels the Calories are given. Cellular respiration ; the process that releases energy by breaking down glucose and other food molecules in the presence of oxygen, begins with a chemical pathway called glycolysis

Explanation:

Hope this helped, Have an amazing, spooky Halloween!!

The relationship between the calorie on a food label with the calorie produced in a cellular respiration is ;

When labeling food to indicate the nutrients contained in the food ( especially canned foods ) the amount of calories contained in the food is indicated and for every Calorie ( 1 calorie ) indicated on the label represents an equivalent of 1000 calories found in cellular respiration.

Hence we can conclude that 1 Calorie indicated on a food label is an equivalent of 1000 calories produced in a cellular respiration.

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Answer:

she became the first presidents wife to advocate actively for legislation

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Why is potential energy MGH?

Potential energy is energy an object has because of its position relative to some other object. ... For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.

Explanation:

Yes Yes Yes Yes Yes Yes

Answer:

The 6 Main Elements are Hydrogen, oxygen, carbon, Nitrogen, calcium & phosphorus

Explanation:

99% of the atoms in the human body come from 6 elements: Hydrogen at about 63%, oxygen (around 25%), carbon (nearly 11%), nitrogen (nearly 0.7%), calcium (0.25%), phosphorus (0.15%) and Calcium which is essential for our bones, & contains 99% of the calcium in the human body

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The answer is the cell wall

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It is found between 30° and 60° N in central and eastern North America and Asia in the major zone of conflict between polar and tropical air masses.

Explanation:i  hope im right

Answer:

Through the use of technology.

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Kingdoms that are autotrophic-

Plantae

Kingdoms that are heterotrophic-

Fungi

Animalia

Protista could be either or.

I think there is something about yeast than all the rest of fungi but you will have to look that up.

Explanation:

Lion and cheetah populations compete for the food source of zebras, and lions outcompete cheetah.

Limiting factors are those factors in the ecosystem which can limit the growth of population of a species in an ecosystem. Predation and competition are two limiting factors in the ecosystem that can decrease or extinct the population of a species. Predation is a limiting factor in which predatory organisms are dependent upon a prey organisms. This is natures way of limiting the surplus growth of prey population and to maintain a balance in ecological community. Competition is a limiting factor in which one or more same or different type of organisms compete for the same resource in an ecosystem. The one which is more competitive will derive those resources other than the one which is less competitive.

According to the given data, it is evident that the population decline in predator cheetah and lion populations because of decline in zebra population but the decline in cheetah population is more than that of lion. It explains the fact that lion is more competitive than cheetah in deriving the food which is already limited. Therefore, lion outcompete cheetah.

Answer:

B( speed of the reaction

Answer:

In an oceanic environment the photic zone is the zone where light can be received it's usually from 0 to 200 m deep but this depth can be modified by the turbidity of the water. The aphotic zone is the zone where no light is receives it goes from 200 to the bottom of the sea.

Explanation:

Answer:

D

Explanation:

A.

The population grows exponentially until it approaches 5,000 individuals, and then the population size begins to decrease.

B.

The population grows exponentially until it approaches 5,000 individuals, and then its growth rate decreases.

C.

The population grows at a constant rate until it approaches 5,000 individuals, and then its growth rate increases.

D.

The population grows at a constant rate until it approaches 5,000 individuals, and then the population size remains stable.

The statement that best described the growth rate of the Monarch butterfly after the Meadow was colonized would be that the population grows at a constant rate until it approaches 5,000 individuals, and then the population size remains stable.

The carrying capacity generally represents the maximum number of individuals of a particular species an environment can support based on the resources that the environment has. Ideally, the population only stabilizes with very minimal oscillation around the carrying capacity. It neither decreases nor increases significantly unless a major disruption happens.

The only option that addresses the stability of populations around the carrying capacity of the environment is option D.

The correct answer is D.

Eggs

Explanation:

Production of egg is called oogenesis. (One egg)

Answer:

The virus uses the host cell to make new viral parts,

Explanation:

Answer:

The second option. By the addition of one phosphate group

Explanation:

ADP is converted to ATP for the storing of energy by the addition of a high-energy phosphate group. The conversion takes place in the substance between the cell membrane and the nucleus, known as the cytoplasm, or in special energy-producing structures called mitochondria.

Answer:

Explanation:

I think it will wash out the yolk and something else out

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Is there more parts to this question?

Explanation:

The only thing I can think of is Prey, or Prey animals..? if there is more parts to this question feel free to drop the full question in the comments and I will attempt to answer it!

Answer:

I have know idea sorry

Explanation:

um yeah ask like someone else lol

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i think it's CH4

Explanation:

Answer:

ch4

Explanation:

stop deleting

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ummmmm what in the world is that- 0_0

Explanation:

Answer:

S.A for Edmentum and Plato

Like and Rate

In step 1, blood goes to the kidney for filtration. If excess sugar exists in the blood, the filtered substances will have more sugar than they do in a person who doesn’t have diabetes. In step 2, there is some reabsorption of sugar. But if there’s an unusually high amount to filter, some sugar will stay in the urine as it passes through the renal tubule to be excreted by the body. This symptom is concerning because it could stress the kidney, which could lead to kidney problems at a young age.

Answer:

Molecular clouds.

Explanation:

High-density and super-heated clouds of matter in a stellar nursery come together and form hot, nuclear balls of plasma called stars.

Answer:

How deep were the skulls buried?

Answer:

DNA moecules C

Explanation:

hope this helps