State Test Practice Science 3

Question 1

What causes the seasons on Earth?

Accepted Answer

The tilt of Earth's axis as it orbits the sun

Answer

Earth's 23.5° axial tilt causes different hemispheres to receive more direct sunlight at different times of year.

Question 2

In an experiment, what is the variable that the scientist changes called?

Accepted Answer

Independent variable

Answer

The independent variable is the factor a scientist deliberately changes to test its effect on the dependent variable.

Question 3

Which process describes water changing from a liquid to a gas?

Accepted Answer

Evaporation

Answer

Evaporation is the process by which liquid water absorbs heat energy and changes into water vapor.

Question 4

What is the atomic number of an element?

Accepted Answer

The number of protons in the nucleus

Answer

The atomic number uniquely identifies an element and equals the number of protons in the nucleus.

Question 5

What is natural selection?

Accepted Answer

The process by which organisms with favorable traits survive and reproduce more successfully

Answer

Natural selection is the mechanism of evolution where individuals with advantageous traits are more likely to survive and pass those traits to offspring.

State Test Practice Practice Test

State Test Practice Practice Test

State Test Practice Science 3