8TH GRADE SCIENCE STAAR REVIEW

Front

What is the formula to calculate force?

Back

Force (F) = Mass (m) × Acceleration (a)

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It occurs when an object speeds up, slows down, or changes direction.

Front

How do you calculate average speed?

Back

Average Speed = Total Distance / Total Time

Front

What do contour lines represent on a map?

Back

Contour lines represent elevation and the shape of the terrain.

Front

What does it mean when contour lines are close together?

Back

Close contour lines indicate a steep slope.

Front

What is net force?

Back

Net force is the total force acting on an object, taking into account all the individual forces.

Front

What is the unit of force?

Back

The unit of force is the Newton (N).

Front

What happens to an object in motion if no net force acts on it?

Back

If no net force acts on an object, it will continue to move at a constant velocity.

Front

What is the relationship between mass and acceleration in Newton's second law?

Back

According to Newton's second law, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Front

What is the average speed of a student who walks 5.0 km in 2.0 hours?

Back

Average speed = 5.0 km / 2.0 hr = 2.5 km/hr.