8th Grade Science 1st Semester Test Review

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction. The total mass of the reactants equals the total mass of the products.

Tags

NGSS.MS-PS1-5

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.

Tags

NGSS.MS-PS1-5

Front

What happens to the mass of reactants during a chemical reaction?

Back

The mass of the reactants remains constant and equals the mass of the products.

Tags

NGSS.MS-PS1-5

Front

What is a convergent plate boundary?

Back

A convergent plate boundary is where two tectonic plates move toward each other, often causing one plate to be forced beneath the other, leading to mountain formation or volcanic activity.

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

Front

What is a divergent plate boundary?

Back

A divergent plate boundary is where two tectonic plates move away from each other, often resulting in the formation of new crust, such as mid-ocean ridges.

Front

What are folded mountains?

Back

Folded mountains are formed when two tectonic plates collide and push the Earth's crust upward, creating folds in the rock layers.

Tags

NGSS.MS-ESS2-2

Front

What is the difference between the Northern and Southern Hemispheres?

Back

The Northern Hemisphere is the half of the Earth that is north of the equator, while the Southern Hemisphere is the half that is south of the equator. Seasons are opposite in each hemisphere.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS2-6

Front

What season occurs in the Northern Hemisphere during September?

Back

Fall (autumn) occurs in the Northern Hemisphere during September.

Tags

NGSS.MS-ESS1-1

Front

What season occurs in the Southern Hemisphere during September?

Back

Spring occurs in the Southern Hemisphere during September.

Tags

NGSS.MS-ESS1-1

Front

What is the role of oxygen in the production of water?

Back

Oxygen combines with hydrogen in a chemical reaction to form water (H₂O). In the equation 2H₂ + O₂ → 2H₂O, one molecule of oxygen reacts with two molecules of hydrogen.

Tags

NGSS.MS-PS1-5