Sand and salt are placed in the bottom of a beaker filled with water. The beaker is heated, and the water is stirred. What will happen to the salt and sand?

The salt will dissolve, and the sand will settle

The sand and salt will settle to the bottom.

The sand and salt will dissolve in the water

The sand will evaporate, and the salt will dissolve.

How is an element different from a compound?

an element is made of a single type of atom, and a compound is made of two or more atom types

an element is highly reactive, and a compound is stable

an element exists in any state, and a compound is only a liquid

an element contains multiple substances, and a compound contains only one pure substance

Which elements in the periodic table have similar properties?

two elements in the same period

What is the atomic number of an element based upon?

number of protons in its nucleus

number of electrons around it's core

number of neutrons in its nucleus

A student notices that a basketball seems to act differently depending on whether the game is being played on a court with a wooden floor, on a concrete driveway, or on a blacktop in the park. they student hypothesizes that the surface on which a ball is bounced affects the height of the bounce. How can the student design an experiment to test the hypothesis?

The student should drop the same ball from the same height on 3 different surface and have someone measure the height of each bounce

The student should drop the same ball from 3 different heights and have someone measure the height of each bounce

The student should drop 3 different balls from the same height and have someone measure the height of each bounce

The student should drop 3 different balls from the same height on 3 different surfaces and have someone measure the height of each bounce

Ena is measuring the pH of various liquids to see if they are acids or bases. Although she is following the same procedure each time, she notices that when she tests a particular liquid she obtains results she does not expect. She is not sure that the result is accurate. What should Ena do to improve the reliability of the data she collects?

perform repeated trials on each liquid

measure a smaller volume of each sample

research more information about acids and bases

Devin is doing an investigation to address the question of how temperature affects the rate of crystal growth. He has 6 jars and adds the same amount of warm water to each jar. Then he adds salt to each jar, enough to make a saturated solution, and stirs until the salt dissolves completely. He observes the jars for several days. Which experimental design allows for the collection of the evidence Devin needs to address this question?

he puts 3 jars in the fridge and 3 jars at room temperature and, records the day the crystals appear

He leaves all 6 jars on the counter and records the temperature and day the crystals appear

He puts all 6 jars in the fridge, and records the day and temperature the crystals appear

He puts 5 jars at room temperature and 1 in the fridge, and records the day the crystals appear

What does pH measure?

the amount of hydrogen (H + ) ions

the amount of hydroxide (OH - ) ions

What are the two types of Mixtures

Elements and Subatomic Particles

Unit 3 Review

8th Grade

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71 Qs

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Unit 3 Review

Quiz

•

Science

•

8th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS1-1, MS-PS1-2, MS-PS1-5

Standards-aligned

Tequila Jefferson

Used 3+ times

FREE Resource

71 questions

Show all answers

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Something that takes up space and has mass.

volume

matter

mass

density

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Yeimel is describing the physical properties of his new gaming chair. Which two physical properties can he determine without using any measuring instruments?

taste and odor

volume and temperatue

texture and color

shape and mass

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Which of the following is a pure substance?

Water

Salad

Chocolate milk

All of them

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Element

Compound

Homogeneous Mixture

Heterogeneous MIxture

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is it?

Pure Substance

Mixture

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is it?

Pure Substance

Mixture

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

When there is 2 or more atoms combined together

Element

Compound

Homogeneous Mixture

Heterogeneous Mixture

Tags

NGSS.MS-PS1-1

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Unit 3 Review

71 questions

Something that takes up space and has mass.

Yeimel is describing the physical properties of his new gaming chair. Which two physical properties can he determine without using any measuring instruments?

Which of the following is a pure substance?

What is it?

What is it?

When there is 2 or more atoms combined together

A group of 2 or more items, that are not chemically combined

Which term describes when a substance is changed from a liquid to a gas?

Sand and salt are placed in the bottom of a beaker filled with water. The beaker is heated, and the water is stirred.

What will happen to the salt and sand?

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