Midterm Science Quiz

Midterm Science Quiz

8th Grade

15 Qs

quiz-placeholder

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Midterm Science Quiz

Midterm Science Quiz

Assessment

Quiz

Science

8th Grade

Medium

NGSS
MS-LS1-1, MS-PS4-2, MS-PS1-1

+2

Standards-aligned

Created by

RACHEL SANGIOVANNI

Used 6+ times

FREE Resource

15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Organs are directly made up of what lower level of cellular organization?

cells

tissues

organisms

organ systems

Answer explanation

Organs are composed of tissues, which are groups of similar cells working together to perform specific functions. Therefore, the correct answer is tissues, as they are the direct building blocks of organs.

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-3

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which two systems in the human body work together to eliminate carbon dioxide (CO₂) from the body?

the excretory and digestive systems

the digestive and circulatory systems

the excretory and respiratory systems

the respiratory and circulatory systems

Answer explanation

The respiratory and circulatory systems work together to eliminate carbon dioxide. The respiratory system expels CO₂ from the lungs, while the circulatory system transports it from body tissues to the lungs for removal.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is different about parasitism compared to the other biological relationships such as mutualism, predation, competition, and commensalism?

A parasitic organism causes harm to other organisms as a result of the symbiotic relationship.

The parasite must utilize a host organism that may or may not die as a result of the relationship.

The host is neither helped nor hurt by the relationship and interaction with the parasitic organism.

Both the parasite and the host are helped by the relationship and interaction with the parasitic organism.

Answer explanation

Parasitism is unique because it involves a parasitic organism that causes harm to its host, unlike mutualism, where both benefit, or commensalism, where one benefits without harming the other.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Radars can help meteorologists detect clouds and sailors detect submarines. Radars send out radio waves and record their echoes after the radio waves reflect off an object. Two radars send out radio waves with the same frequency. The first radar sends radio waves through the air. The second radar sends radio waves through the ocean. What is true about these radio waves?

They are visible.

They are audible.

They have different speeds.

They have the same wavelength.

Answer explanation

Radio waves travel at different speeds in different mediums. In air, they move faster than in water. Therefore, the radio waves from the first radar (in air) and the second radar (in ocean) have different speeds.

Tags

NGSS.MS-PS4-2

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is one of the energy conversions taking place in a campfire?

heat to light

heat to kinetic

chemical to light

light to chemical

Answer explanation

In a campfire, chemical energy from the burning wood is converted into heat and light. The correct choice, 'heat to light', describes the conversion of thermal energy produced by the fire into visible light.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Modern telescopes make it possible for astronomers to detect planets around distant stars. Why couldn’t astronomers detect these planets before?

The planets are much closer than the stars they orbit.

The planets are much larger than the stars they orbit.

The planets are much farther than the stars they orbit.

The planets are much smaller than the stars they orbit.

Answer explanation

Astronomers couldn't detect these planets before because they are much smaller than the stars they orbit, making them difficult to observe against the bright light of the stars.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

José performs an experiment to determine how much sugar can be dissolved in 250 milliliters (mL) of water at 25°C. He adds 50 grams (g) of sugar at a time to the water while stirring and observes the solution. After adding sugar the eleventh time (550 g), he notes that undissolved sugar has settled to the bottom of the container. He stops adding sugar and ends his experiment. In his lab write-up he concludes that the solubility of sugar in water at 25°C is 500 g per 250 mL. Is his conclusion defensible, and why or why not?

No, because he did not add sugar enough times.

Yes, because when he added more than 500 g it did not all dissolve.

No, because he does not know if any of the final portion of sugar dissolved.

Yes, because when he added the tenth portion (500 g) all of it dissolved.

Answer explanation

Yes, because when he added the tenth portion (500 g) all of it dissolved, indicating that this is the maximum solubility of sugar in 250 mL of water at 25°C.

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