Quiz about STAAR PRACTICE 1

Question 1

Which statement about the sun is true?

Accepted Answer

It is closer to Earth than any other star.

Answer

It is the hottest star in the universe.

Answer

It is located in the center of the Milky Way galaxy.

Answer

It is the largest type of star known to exist.

Question 2

Which statement BEST describes a component of cell theory?

Accepted Answer

All cells come from preexisting cells.

Answer

All cells form from molecules.

Answer

All cells create genetically identical cells.

Answer

All cells reproduce from simpler cells.

Question 3

Which prediction can be made about a forest after a controlled burn has occurred?

Accepted Answer

Important nutrients for new plant growth will be returned to the soil.

Answer

The ability of plants to reproduce will decrease.

Answer

Short-term air quality in the area will improve.

Answer

Long-term biodiversity will be reduced.

Question 4

Which statement BEST explains why baking a cake is evidence of a chemical reaction?

Accepted Answer

The ingredients formed a new substance after they were cooked in the oven.

Answer

The state of matter of some of the ingredients changed while being cooked.

Answer

The total mass of the ingredients was the same before and after they were cooked.

Answer

The temperature of the ingredients increased as they absorbed thermal energy from the oven.

Question 5

Which factor contributes MOST to the formation of a hurricane?

Accepted Answer

High water temperatures

Answer

High water density

Answer

High water oxygen levels

Answer

High water volume

Question 6

A student researches an ecosystem and draws the food web shown. How many secondary consumers are in this food web?

Accepted Answer

5

Answer

2

Answer

3

Answer

4

Question 7

A student graphs the motion of a toy car moving in a straight line over a 10-second time period. Which statement BEST describes the motion of the car?

Accepted Answer

The car moved at a speed of 1 meter per second during the first 5 seconds and then moved at a slower speed during the next 5 seconds.

Answer

The car moved at a speed of 5 meters per second during the first 5 seconds and then moved at a slower speed during the next 5 seconds.

Answer

The car moved at a speed of 5 meters per second during the first 5 seconds and then moved at a faster speed during the next 5 seconds.

Answer

The car moved at a speed of 1 meter per second during the first 5 seconds and then moved at a faster speed during the next 5 seconds.

Question 8

A student draws models of Earth and the sun in different positions. Which drawing should be used to represent summer in the Southern Hemisphere?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 9

How many different elements are in the chemical equation?

Accepted Answer

4

Answer

2

Answer

13

Answer

50

Question 10

Which two organisms compete with rabbits for biotic resources?

Accepted Answer

Goats and mice

Answer

Coyotes and wolves

Answer

Goats and wolves

Answer

Snakes and owls

Question 11

A diagram of a convection current is shown. Which statement correctly describes the changes in the air as it moves from Location R to Location T?

Accepted Answer

The sun heats the land faster than the ocean water, so high-density air moves from the ocean to the land, becoming less dense.

Answer

The sun heats the land faster than the ocean water, so high-density air moves from the land to the ocean, becoming less dense.

Answer

The sun heats the land slower than the ocean water, so high-density air moves from the ocean to the land, becoming less dense.

Answer

The sun heats the land slower than the ocean water, so high-density air moves from the land to the ocean, becoming less dense.

Question 12

Student 1 claims that whenever the color of a substance changes, a chemical change has occurred. Student 2 claims that food coloring can change the color of a substance without causing a chemical change. To test their claims, the students add red food coloring to a glass of water. The students observe that the clear water turns a light pink color. Their teacher then runs a test to show that the pink solution contains both water molecules and food-coloring molecules. Based on these findings, which student is correct?

Accepted Answer

Student 2, because no new substance was formed when there was a color change

Answer

Student 1, because the food-coloring molecules were found in the pink solution

Answer

Student 1, because the state of matter changed when the food coloring was added

Answer

Student 2, because the red food coloring caused the water to change to a pink color

Question 13

Assuming the crate is on a frictionless surface, describe the effect of these forces on the crate. Will the crate move toward the left, toward the right, or not at all?

Accepted Answer

The crate will move toward the left.

Answer

The crate will move toward the right.

Answer

The crate will not move at all.

Question 14

Assuming the crate is on a frictionless surface, describe the effect of these forces on the crate. What is the direction and the magnitude of the net force on the crate?

Accepted Answer

The net force is in the direction of the larger force, with a magnitude equal to the difference between the two forces.

Answer

The net force is zero, and the crate remains stationary.

Answer

The net force is in the direction of the smaller force, with a magnitude equal to the sum of the two forces.

Answer

The net force is in the direction of the larger force, with a magnitude equal to the sum of the two forces.

Question 15

Which action would MOST LIKELY reverse the trend shown in the table?

Accepted Answer

B) Requiring ships to return non-adult fish to the ocean so that they can grow and reproduce

Answer

A) Increasing the total weight of fish that each ship can remove from the ocean each day

Answer

C) Decreasing the number of policing ships in order to lessen capacity restrictions and regulations

Answer

D) Promoting meals centered around specific fish species in restaurants in order to increase profits

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