7th Semester 2 Review

The chemical formula for Al₂(SO₄)₃. How many atoms of aluminum (Al) are in the chemical formula?

• 1

• 2

• 3

• 6

Tags

NGSS.MS-PS1-1

In the chemical formula Al₂(SO₄)₃, how many atoms of sulfur (S) are present?

• 1

• 12

• 3

• 4

Tags

NGSS.MS-PS1-1

How many atoms of oxygen (O) are in the chemical formula Al₂(SO₄)₃?

• 4

• 7

• 12

• 3

Tags

NGSS.MS-PS1-1

In the formula NH₄Cl, what is the total number of atoms involved?

• 4

• 5

• 6

• 7

Tags

NGSS.MS-PS1-1

The formula for glucose is BaSO₄. How many elements does glucose contain?

• 1

• 3

• 5

• 6

The table lists their observations from a student's lab experiment. Did a chemical change take place in any of the substances?

• A chemical change occurred in all substances.

• A chemical change occurred only in substance 2.

• A chemical change occurred in substances 1 and 4.

• A chemical change occurred in substances 2 and 3.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following are physical changes? Select TWO correct answers.

• Iron rusting

• Copper changing color

• Boiling water

• Hydrogen and oxygen producing water

• Ice cream melting

The graph represents the motion of a car. What is the average speed of the car?

• 0.2 km/min

• 0.5 km/min

• 1 km/min

• 10 km/min

Tags

NGSS.MS-PS3-1

Two students created the table displayed. Which of the following statements accurately describes the information in the table?

• Student A listed examples of velocity and Student B listed examples of speed.

• Both Student A and Student B listed examples of velocity.

• Student A listed examples of speed, and Student B listed examples of velocity.

• Student A and B listed examples of speed.

Maggie Takes Path A and Lucy Takes Path B. They both travel at a speed of 3 miles/hour. What is true of their motion?

• Lucy's velocity was less than Maggie's velocity.

• Lucy's displacement was the same as Maggie's velocity.

• Lucy's displacement was greater than Maggie's velocity.

• Lucy and Maggie traveled the same distance.