Map Science Review

Which process describes only a physical change? (a)  

• Process 4

• Process 1

• Process 2

• Process 3

Answer explanation

Process 4 describes a physical change, as it involves alterations in form or appearance without changing the substance's chemical composition. The other processes may involve chemical changes.

Tags

NGSS.MS-PS1-4

NGSS.MS-ESS2-4

A clear liquid from a flask is poured into another clear liquid in a beaker. Which of the following results of this procedure would indicate a new substance was formed?

• The level of the substance in the beaker is higher after the other liquid is added.

• A yellow solid forms and then settles to the bottom of the beaker.

• Small white crystals are left behind in the flask that held the first liquid.

Answer explanation

A yellow solid forming and settling indicates a chemical reaction occurred, producing a new substance. The other options do not confirm the formation of a new substance.

Tags

NGSS.MS-PS1-2

What is the net force?

• 20 N 

• 0 N 

• 400 N 

• 40 N 

Answer explanation

The net force is the vector sum of all forces acting on an object. If the forces balance out, the net force is 0 N. However, if there is a resultant force of 40 N in one direction, that is the net force.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which liquid is the least dense?

• Oil

• Water

• Syrup

• Plastic bottle

Answer explanation

Oil is less dense than both water and syrup, making it the least dense liquid among the options provided. This is why oil floats on water.

Tags

NGSS.MS-PS1-2

I am ductile - I can be drawn into wires.

• Metals

• Nonmetals

• Metalloids

Answer explanation

Metals are ductile, meaning they can be drawn into wires. This property is characteristic of metals, while nonmetals and metalloids do not exhibit this behavior.

Tags

NGSS.MS-PS1-1

What is the name of the reaction in which energy is released?

• exothermic

• endothermic

• physical

• chemcial

Tags

NGSS.HS-PS1-4

What is the name of the reaction in which energy is absorbed?

• exothermic

• endothermic

• chemcial

• physical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

Which term best describes this diagram?

• Diffraction

• Rarefaction

• Reflection

• Absorption

Answer explanation

Tags

NGSS.MS-PS4-2

True or False The total amount of energy in a system will changed depending on its surroundings.

• true

• false

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

Emily slid down the sliding board at the park. Where did she have the most kinetic energy?

• In the middle of the slide

• At the top of the slide

• At the end of the slide when she stopped

• Near the bottom of the slide

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-1