Victor is investigating sound waves. He takes an alarm clock, places it in a jar, and uses a food vacuum to remove all of the air from the jar. When the alarm goes off, Victor cannot hear the sound. Why?

There are no air particles, and sound waves need a medium in order to travel.

The jar is absorbing all of the sound waves.

The vacuum is absorbing all of the sound waves.

The lid of the jar bounces the sound wave back into the jar.

Eric is in the middle of practicing with his guitar. What happens to the pitch of the sound when Eric tightens his guitar string?

The pitch increases because the frequency of the wave is increased

The pitch decreases because the frequency of the wave is increased

The pitch decreases because the frequency of the wave is decreased

The pitch increases because the frequency of the wave is decreased

Heat energy always transfers from ______ to _______ until _________

hot; cold; they reach the same temperature

hot; cold; no more heat energy remains

cold; hot; no more heat remains

cold; hot; they reach the same temperature

The Law of Conservation of Energy states that:

Energy cannot be created or destroyed, it can only change forms

Energy can be created and destroyed

Energy has to change form to be usable

Objects lose energy until they have none

Which of the following is true of solids. (You may pick more than one answer.)

Atoms in a solid have little energy.

Atoms in a solid are tightly packed together.

Atoms in a solid move very quickly.

Atoms in a solid do not move at all.

When gaseous water turns into liquid water, which of the following are true? (You may chose more than one answer.)

The water molecules lose energy.

The water molecules gain energy.

Select the true statement about the picture.

They will pull together because opposite poles attract.

They will push apart because opposite poles repel.

They will push apart because like poles repel.

They will pull together because like poles attract.

Which of the following is true about gravity?

Gravity always pulls everything down.

Which of the following is true?

Thermal energy always flows from hot to cold.

Thermal energy always flows from cold to hot.

Thermal energy sometimes flows from hot to cold.

Thermal energy sometimes flows from cold to hot.

Which of the following is true about kinetic energy? (You may chose more than one answer.)

An object with a faster speed will have more kinetic energy.

An object with more mass will have more kinetic energy.

An object with less mass will have more kinetic energy.

An object with a slower speed will have more kinetic energy.

How does the distance between objects affect the strength of the force?

When distance decreases, the strength of the force increases.

Distance does not affect the strength of the force.

When distance increases, the strength of the force increases.

Distance only affects the strength of magnetic force.

Which of the following are true about conduction?

A conductor is a material that passes thermal energy quickly and easily.

Thermal energy is transferred when particles bump into each other.

The thermal energy flows in a current.

An insulator is a material that passes thermal energy quickly and easily.

Which of the following are examples of convection?

Floating ice cubes cooling down an entire glass of lemonade

Heating vents installed near the floor

Roasting marshmallows near a fire

Warming up your hands by holding a mug of hot cocoa

In chemical reactions, what does the principle of conservation of mass mean?

Matter is not created or destroyed.

The total mass of the reactants is greater than the total mass of the products.

The total mass of the reactants is less than the total mass of the products.

Which is the Law of Conservation of Matter?

matter cannot be created or destroyed, it only changes form

matter can be created but it cannot be destroyed, it never changes form

matter can be destroyed but it cannot be created, it usually just changes form

matter is an unproven theory created by Hans Geiger

A molecule is________

more than one atom bonded together

7th Grade Science Review

Authored by Emily Adkins

Science

7th Grade

NGSS covered

Used 55+ times

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Content View

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73 questions

Show all answers

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What unit do we measure Force in?

Newtons

Joules

Force

Midi-chlorians

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Directs all cell activities through the DNA located there.

Lysosomes

Nucleus

ribosomes

Mitochondria

Tags

NGSS.MS-LS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

I am a protein packaging and shipping machine! Who am I?

vacuole

ribosome

mitochondrion

golgi apparatus

Tags

NGSS.MS-LS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the name of the genetic material that is inside the nucleus?

ATP

YOLO

DNA

Tags

NGSS.MS-LS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where are proteins made?

Golgi body

Mitoichondria

Chromosomes

Ribosomes

Tags

NGSS.MS-LS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What organelle is called the "powerhouse" of a cell?

Endoplasmic Reticulum

Nucleus

Mitochondria

Nucleolus

Tags

NGSS.HS-LS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the gel-like substance inside of cells called?

photoplasm

photosynthesis

cytoskeleton

cytoplasm

Tags

NGSS.MS-LS1-2

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7th Grade Science Review

What unit do we measure Force in?

Directs all cell activities through the DNA located there.

I am a protein packaging and shipping machine! Who am I?

What is the name of the genetic material that is inside the nucleus?

Where are proteins made?

What organelle is called the "powerhouse" of a cell?

What is the gel-like substance inside of cells called?

Energy due to motion is ____________ energy.

The faster an object moves, the ________ kinetic energy it has.

__________ is stored energy.

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