8th Grade Science Review

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides.

Tags

NGSS.MS-PS1-5

Front

What is an unbalanced chemical equation?

Back

An unbalanced chemical equation does not have equal numbers of each type of atom on both sides.

Tags

NGSS.MS-PS1-5

Front

How do you calculate average speed?

Back

Average speed is calculated by dividing the total distance traveled by the total time taken.

Front

What is the average speed of a car that travels 150 kilometers in 3 hours?

Back

50 km/h

Front

What is an example of an unbalanced force?

Back

A car accelerating on a highway.

Tags

NGSS.MS-PS2-2

Front

What is the formula to calculate distance?

Back

Distance = Speed × Time.

Front

If a train travels at a speed of 80 km/h for 2.5 hours, what distance does it cover?

Back

160 km

Front

What is cohesion in the context of water?

Back

Cohesion is the attraction between water molecules that allows water to travel up a plant's stem.

Front

What is adhesion in the context of water?

Back

Adhesion is the attraction between water molecules and other substances, such as the walls of a plant's stem.

Tags

NGSS.MS-ESS2-4

Front

What role does gravity play in the movement of water in plants?

Back

Gravity pulls water down, but cohesion and adhesion help water move upward against gravity.