STAAR Review Science

• To give the organisms a way to escape

• To provide oxygen for the organisms

• To help dry out the habitat

• To allow water to get in to the terrarium

• The Sagebrush will decrease.

• The number of Frilled Lizards will decrease.

• The Sun will receive more energy.

• The number of Frilled Lizards will increase.

A hedgehog is a small animal that lives in the

forest ecosystem. They are covered with sharp

quills and have the ability to roll themselves into

a little ball when feeling threatened by an

enemy. Which of the following is an adaptation

of a hedgehog?

• Breathing in oxygen

• having sharp quills

• living in a forest ecosystem

• their diet

Giant Salvinia is a water plant that grows in South

America. The United States brought the water

plant over for use in ponds and aquariums. A

disadvantage of this plant is that it grows quickly

in Texas and can completely cover ponds and

lakes. What effect does this most likely have on

an ecosystem?

• The Salvinia blocks sunlight that other native

  plants need.

• The water supply increases in the area.

• Other plant growth in the area increases.

• The amount of rainfall in the area changes.

• The chicken goes through complete

  metamorphosis.

• The moth goes through incomplete

  metamorphosis.

• The chicken needs oxygen but the moth does not.

• Both the chicken and the moth start out as an egg.

• wheat only

• hawk, wheat,

  and grasshopper

• snake only

• hawk and snake

Different monkey species eat a variety of

foods such as fruit, insects, leaves, and

reptiles. A monkey that knows which tree

has the most fruit is an example of --

• an adaptation

• a learned behavior

• an inherited trait

• an environmental trait

Which of the following statements about

ecosystems is true?

• A decrease in an organism’s population will

  affect another organism in an ecosystem.

• Plants provide all the energy in an ecosystem.

• Non-living elements in an ecosystem are not

  important.

• Not all ecosystems need oxygen.

Which statement best explains what happens

in step Y of the tomato plant life cycle?

• Fruit forms.

• The plant grows roots.

• The seed is

  planted.

• The seedling emerges.

What were the students most likely

investigating?

• Which bird’s feet have hollow bones?

• Which birds can hop the farthest?

• Which model of a bird’s foot moves more

  water?

• Why do bird’s have different feet?