Why does a black car become hotter than a white car when parked in the sun?

The black car absorbs more sunlight, converting it into heat.

The black car reflects more sunlight than the white car.

The black car allows sunlight to pass through more easily.

The black car refracts sunlight and spreads heat evenly.

Which statement best describes the property of light waves illustrated in the diagram below?

Light waves are refracted by some materials.

Some materials absorb light waves.

Some materials reflect light waves.

Light waves are emitted by some materials.

Which characteristic is used to identify an element as unique from others?

The number of protons in the nucleus.

The number of electrons in the atom.

The number of neutrons in the nucleus.

Refer to the periodic table to compare carbon and nitrogen. Which trend is observed when comparing the atoms of carbon and nitrogen?

Nitrogen has more subatomic particles than carbon.

Both elements have the same number of electrons.

Nitrogen has fewer subatomic particles than carbon.

Carbon has more protons and neutrons than nitrogen.

Which statement correctly compares a proton and an electron?

They have opposite charges but different masses.

They have the same charge and the same mass.

They have the same mass but different charges.

They are both found in the nucleus of the atom.

Atoms are made up of protons, neutrons, and electrons, which determine the identity of each element. In what way do the atomic structures of carbon and nitrogen differ?

Carbon has 6 protons and nitrogen has 7 protons, so they are different elements.

Carbon and nitrogen have the same number of protons but different numbers of neutrons.

Nitrogen has fewer electrons than carbon, making it less stable.

Carbon has more neutrons than nitrogen, making it a heavier element.

How do the different properties of elements (metals, nonmetals, metalloids) affect the way scientists and engineers use them in daily life? Provide from the description above the example in your answer.

Scientists and engineers use metals for their conductivity, nonmetals for insulation, and metalloids for their mixed properties.

Scientists and engineers use all elements only for decoration.

Scientists and engineers use only nonmetals in technology.

Scientists and engineers do not consider element properties when choosing materials.

According to the passage, why is burning a candlewick considered a chemical change?

Burning creates new substances such as smoke and ash.

Burning makes the candle look better.

The wick changes form but stays the same substance.

Which statement best compares physical and chemical changes as described in the passage?

B. Physical changes alter the form of a substance, while chemical changes produce new substances.

A. Physical changes alter the form of a substance, chemical changes produce new substances.

C. Chemical changes can always be reversed, physical changes cannot.

D. Physical changes create smoke, but chemical changes do not.

Identify one chemical change and one physical change mentioned in the passage. Use specific evidence from the text to explain why each is classified as chemical or physical.

A chemical change involves a new substance being formed, while a physical change does not alter the substance's identity.

A chemical change and a physical change both result in new substances being formed.

A physical change always involves a color change, while a chemical change does not.

A chemical change can be reversed easily, while a physical change cannot.

A student places a piece of magnesium metal into hydrochloric acid. Bubbles rapidly form, and the test tube gets warm. After the reaction, a white powder remains in the solution. Which observation provides the best evidence that a chemical change occurred?

A new substance formed and the temperature changed.

The test tube was made of glass.

The student used a graduated cylinder.

Which observation most clearly shows that a chemical reaction has taken place when two transparent liquids are mixed?

A yellow substance forms and settles at the bottom of the container.

The mixture remains completely clear.

The temperature of the mixture does not change.

No visible change occurs after mixing.

Refer to the diagram showing the process of photosynthesis. Which of the following statements is correct about the atoms involved in the reaction?

The same atoms were present before and after the reaction, but rearranged.

Atoms disappeared during the reaction.

All of the atoms combined into a gas and floated away.

29. A student places saltwater in a beaker and leaves it uncovered for a few days. Eventually, only white crystals remain. The salt remains after a few days because:

the water evaporates, leaving the salt behind

the salt evaporates with the water

The model below represents cellular respiration taking place in an organelle within a body cell. Which organelle is represented in the model and is correctly paired with its function for the cell as a whole?

A. mitochondria: releases energy from food

B. chloroplast; captures energy to make food

C. nucleus control center of the cell

D. cell membrane; allows food to enter and wastes to leave the cell

The model below represents cellular respiration taking place in an organelle within a body cell. Which statement best describes a major difference between plant and animal cells?

D. Only plant cells have cell walls

A. Only plant cells have a nucleus.

B. Only animal cells use oxygen.

Chloroplasts are important to plant cells because they:

carry out photosynthesis to produce food for the plant

store genetic information for the plant

regulate water loss in the plant

provide structural support to the plant

Why does your heart beat faster when you exercise?

To deliver more oxygen and nutrients to your cells.

To remove more oxygen and nutrients to your muscles.

To make you feel more energized.

Which of the following correctly sequences the level of organization from simplest to most complex in a multicellular organism?

Cell → tissue → organ → system

Organ → system → cell → tissue

Organ → tissue → system → cell

Cell → system → tissue → organ

During a basketball game, CJ runs across the court, catches a pass, and shoots the ball. His brain quickly sends signals through nerves to his muscles, telling his legs and arms how to move. His heart beats faster to deliver oxygen-rich blood, and he breathes more rapidly. As he jumps and shoots, his skeleton provides support and structure for movement. These actions require coordination between the nervous, muscular, circulatory, respiratory, and skeletal systems.

The skeletal and muscular systems work together to move, and the nervous system directs that movement.

The circulatory system gives instructions to the skeletal system to pump blood.

The digestive system provides energy for the respiratory system to move muscles.

The muscular system creates oxygen and stores it for use by the circulatory system.

Which two body systems work together to allow CJ to move and shoot the basketball by sending signals to muscles and providing support for movement?

Respiratory and circulatory systems

Muscular and respiratory systems

Circulatory and skeletal systems

Waves and Sound Worksheet

Authored by Sherry Ostroff

Science

7th Grade

NGSS covered

Used 1+ times

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40 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During a thunderstorm, why do you see the flash of lightning before you hear the sound of thunder?

Sound waves move faster than light waves.

Light waves travel faster than sound waves.

Thunder is produced before lightning.

Light and sound travel at the same speed.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of wave can travel through a vacuum, such as space?

Sound wave

Light wave

Ocean wave

Seismic wave

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement is true based on what you know about waves?

Sound waves can travel through space.

Light waves require air to travel.

Sound waves must travel through a medium like air or water.

Light waves can only travel through solids.

Tags

NGSS.MS-PS4-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the amplitude of sound waves increases, the sound becomes:

louder

softer

higher in pitch

lower in pitch

Tags

NGSS.MS-PS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Electromagnetic waves vary in their energy depending on their frequency and wavelength. Waves with higher frequencies have more energy. Infrared rays have longer wavelengths than visible light, so they carry less energy. X-rays and gamma rays have much higher frequencies and can penetrate materials that visible light cannot. This is why they are used in medical imaging, but they can also be harmful if not used carefully.

A. Infrared rays have more energy than X-rays.

B. X-rays can penetrate materials because they have higher energy.

C. Visible light has a higher frequency than gamma rays.

D. X-rays are completely safe for unlimited exposure.

Tags

NGSS.MS-PS4-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Ultraviolet, X-rays, and gamma rays are similar in which of the following ways?

They are all types of electromagnetic waves with high energy.

They are all visible to the human eye.

They all have the same wavelength.

They are all used for communication signals.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of electromagnetic radiation has a shorter wavelength than ultraviolet rays?

Infrared rays

Radio waves

Microwaves

X-rays

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Waves and Sound Worksheet

During a thunderstorm, why do you see the flash of lightning before you hear the sound of thunder?

What type of wave can travel through a vacuum, such as space?

Which statement is true based on what you know about waves?

If the amplitude of sound waves increases, the sound becomes:

Ultraviolet, X-rays, and gamma rays are similar in which of the following ways?

Which type of electromagnetic radiation has a shorter wavelength than ultraviolet rays?

Which of the following is not a form of electromagnetic radiation?

Why does a black car become hotter than a white car when parked in the sun?

Which of the following materials is best at reflecting light?

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