MID LEVEL Assessment Review

Which of the following best describes how energy is transferred by objects in motion?

• Energy is transferred through sound waves.

• Energy is transferred through light waves.

• Energy is transferred through motion and waves in water.

• Energy is transferred through heat.

Answer explanation

Energy is transferred through motion and waves in water, as moving objects can create waves that carry energy. This choice best describes the transfer of energy in dynamic systems.

Tags

NGSS.MS-PS3-5

Which material is a good conductor of electrical energy?

• Rubber

• Copper

• Wood

• Plastic

Answer explanation

Copper is a well-known conductor of electrical energy due to its high electrical conductivity. In contrast, rubber, wood, and plastic are insulators and do not conduct electricity effectively.

What is necessary for electrical energy to produce light in a circuit?

• An open path

• A closed path

• A broken wire

• A plastic insulator

Answer explanation

A closed path is necessary for electrical energy to flow in a circuit, allowing it to produce light. An open path or a broken wire would interrupt the flow, while a plastic insulator does not facilitate electrical conduction.

Which of the following is an observable physical property of matter?

• Color

• Taste

• Temperature

• Smell

Answer explanation

Temperature is an observable physical property of matter that can be measured and quantified, unlike color, taste, and smell, which are subjective and can vary between individuals.

Tags

NGSS.5-PS1-3

What happens when you mix oil and water?

• They form a solution.

• They form a mixture but do not mix completely.

• They dissolve completely.

• They change into a solid.

Answer explanation

When oil and water are mixed, they do not form a solution or dissolve completely due to their different polarities. Instead, they create a mixture where the oil floats on top of the water, indicating they do not mix completely.

Which of the following is an example of a solid?

• Water

• Air

• Ice

• Steam

Answer explanation

Ice is a solid form of water, while water, air, and steam are liquids or gases. Therefore, ice is the correct example of a solid.

Which of the following materials is an insulator of thermal energy?

• Metal

• Glass

• Wool

• Copper

Answer explanation

Wool is an effective thermal insulator, trapping air and reducing heat transfer. In contrast, metals like copper and aluminum are good conductors of heat, while glass has moderate insulating properties, making wool the best choice here.

Tags

NGSS.MS-PS3-3

What is the physical state of water at room temperature?

• Solid

• Liquid

• Gas

• Plasma

Answer explanation

At room temperature, which is typically around 20-25°C, water exists in a liquid state. It is only solid (ice) below 0°C and gas (water vapor) above 100°C, while plasma is a state not applicable to water under normal conditions.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following best describes a solution?

• A mixture of solids

• A mixture of liquids and solids

• A mixture where substances are evenly distributed

• A mixture that cannot be separated

Answer explanation

A solution is defined as a mixture where substances are evenly distributed at the molecular level, resulting in a homogeneous composition. This distinguishes it from other mixtures that may not have uniform distribution.

Which of the following is an example of energy transfer through sound?

• A light bulb glowing

• A bell ringing

• A car moving

• A heater warming a room

Answer explanation

A bell ringing is an example of energy transfer through sound, as it produces sound waves that carry energy. The other options involve different forms of energy transfer, such as light or heat.

Tags

NGSS.MS-PS4-2