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7th Grade Science Topic Assessment Chemical Reactions

Authored by Mechele Newell

Science

7th Grade

NGSS covered

Used 464+ times

7th Grade Science Topic Assessment Chemical  Reactions
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14 questions

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1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Early in the day, Josiah learned about the kinds of changes in matter that can take place.

Later that day, he made toast and buttered it, but then he left the butter out on the warm stove. What kind of change would most likely take place with the butter?

chemical

physical

liquid

solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

2.

MULTIPLE CHOICE QUESTION

5 mins • 4 pts

After having studied chemical reactions in school, Bryce knew that when oxygen and hydrogen gases combine in the correct amounts, the combination yields a new substance, water. Choose the words to finish the sentence.

The hydrogen and oxygen are ________, while the water is the_______

wet, dry

reactants, product

product, reactants

hot, cold

Tags

NGSS.MS-PS1-2

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Gregory saw a rusty old car in an abandoned lot. Because he had recently read about chemical reactions, he began to wonder how the rust formed. What happened to cause the rust on the steel car?

A physical change took place in the steel of the car to form rust.

Oxygen in the air reacted with the paint on the car and formed rust.

Oxygen in the air chemically combined with the iron in the steel to form rust.

A decomposition chemical reaction took place when the iron in the steel mixed with oxygen to form rust.

Tags

NGSS.MS-PS1-2

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

After learning about the law of conservation of mass, Natalie began to wonder about how to best test this law. She wanted to show that the total amount of matter did not change, but a process produced the same amount of different kinds of matter. What is the best way to study this law?

in a homogeneous mixture

in a heterogeneous mixture

in an open system

in a closed system

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Carmelo was using a heavy duty glue one afternoon after learning about synthetic materials. Chemists create different kinds of new products based on their knowledge of the properties of substances and how they react with each other. Sometimes, chemists create a product different than what they intended to create, like the type of glue Carmelo used. What kind of product was this type of glue?

accidental

developed

known

planned

Tags

NGSS.MS-PS1-2

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Londynn drinks water from plastic bottles. She knows the bottles are formed from synthetic polymers that are created in a chemical reaction. She also knows that synthetic materials can cause problems. Which statement explains one kind of problem that can develop from using synthetic materials such as plastic?

Plastics have changed the way people use materials.

Plastics have made the lives of people easier.

Plastics have contributed to more pollution.

Plastics have made more work for people.

Tags

NGSS.MS-PS1-3

7.

MULTIPLE CHOICE QUESTION

5 mins • 2 pts

Robert is researching alternative fuels and learns about different types of alcohol. They can be synthesized from wood and grasses or produced from crops that are already grown in many parts of the world. When mixed with gasoline, alcohol raises the octane, which makes the gasoline burn more efficiently. It also reduces the amount of pollutants released. Robert makes notes about a number of characteristics of alcohol fuels, as listed below. Which are BENEFITS?

reduce air pollution, renewable

more expensive than gasoline, contain less energy per liter

require farmland, renewable, and raise octane

Tags

NGSS.HS-ESS3-4

NGSS.HS-ETS1-3

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