Quiz about 7th Grade: Second Semester Test

Question 1

Solutions are a special kind of mixture in which .

Accepted Answer

substances are dissolved together

Answer

Each object stays the same in the mixture

Question 2

_______ means to spread out evenly in a liquid.

Accepted Answer

Dissolve

Answer

Mix

Question 3

In which mixture can you see all of the parts?

Accepted Answer

Heterogeneous

Answer

homogeneous

Question 4

In which mixture can you NOT see all of the parts?

Accepted Answer

homogeneous

Answer

Heterogeneous

Question 5

A combination of two or more substances where each keep their own properties

Accepted Answer

Mixture

Answer

Solution

Question 6

__________ are made up of solutes and solvents.

Accepted Answer

Solutions

Answer

Suspensions

Question 7

What is THE universal solvent?

Accepted Answer

Water

Answer

Soup

Question 8

A mixture containing small, undissolved particles that do not settle out is a(an)

Accepted Answer

Colloid

Answer

suspension

Question 9

A heterogeneous mixture in which particles settle is a(an)

Accepted Answer

suspension

Answer

Solution

Question 10

A change in which NEW substances are formed.

Accepted Answer

Chemical change

Answer

Physical change

Question 11

Which of the following is a physical change?

Accepted Answer

Getting a haircut

Answer

Rusty metal

Question 12

Is a rusting bicycle a chemical or physical change?

Accepted Answer

Chemical

Answer

physical

Question 13

Which of the following describes a precipitate?

Accepted Answer

a solid forms when one liquid is poured into another

Answer

a gas forms when a solid is placed in a liquid

Question 14

What type of reaction occurs in a hand warmer

Accepted Answer

Exothermic

Answer

Endothermic

Question 15

20. reactions usually feel cold.

Accepted Answer

endothermic

Answer

Exothermic

Question 16

Is the diagram showing a balanced or unbalanced equation?

Accepted Answer

Balanced

Answer

Unbalanced

Question 17

28. A common synthetic material that is found almost everywhere is _________?

Accepted Answer

Plastic

Answer

Wood

Answer

Cotton

Answer

Glass

Question 18

Natural resources are

Accepted Answer

Resources that exist within the environment without humans having to intervene, or put them there.

Answer

Resources that exist within the environment due to human actions.

Question 19

Synthetic materials are made from chemically processing .

Accepted Answer

natural resources

Answer

Chemicals

Question 20

Synthetic materials tend to be than natural materials.

Accepted Answer

more durable

Answer

less durable

Question 21

Define polymer

Accepted Answer

long, chain-like molecule made of repeating units

Answer

short molecule made of a few repeating units

Answer

circular molecule made with many repeating units

Answer

chain-like molecule that contains hydrogen and oxygen

Question 22

Photosynthesis is the process where:

Accepted Answer

Plants make their own food

Answer

Plants make flowers

Question 23

Photosynthesis could not happen without

Accepted Answer

The sun

Answer

The moon

Question 24

The two REACTANTS of photosynthesis are

Accepted Answer

Water and Carbon Dioxide

Answer

Glucose and Oxygen

Question 25

The two PRODUCTS of photosynthesis are

Accepted Answer

Glucose and Oxygen

Answer

Water and Carbon Dioxide

Question 26

Photosynthesis takes place in a plant's

Accepted Answer

Leaves

Answer

Stem

Question 27

Chlorophyll is what makes plants

Accepted Answer

Green

Answer

Blue

Question 28

Plants are called producers because they

Accepted Answer

make their own food

Answer

eat other organisms

Answer

decompose dead matter

Answer

depend on animals for food

Question 29

Why do humans NEED plants to survive?

Accepted Answer

We breathe the oxygen they release

Answer

They produce the water we drink

Question 30

__________ is the process that cells use to take energy from glucose.

Accepted Answer

Cellular respiration

Answer

Photosynthesis

Question 31

In a cell, the mitochondria is like the .

Accepted Answer

Powerhouse

Answer

highway system

Question 32

What two things are needed for cellular respiration to happen in a cell?

Accepted Answer

glucose & oxygen

Answer

water & carbon dioxide

Question 33

Cellular respiration and photosynthesis are .

Accepted Answer

Exact opposites

Answer

not related in any way

Question 34

Fermentation releases energy without oxygen. This is called

Accepted Answer

Anaerobic

Answer

aerobic

Question 35

During exercise, the amount of carbon dioxide produced is

Accepted Answer

Increased

Answer

Decreased

Question 36

Humans do not use photosynthesis directly to get energy. This makes us

Accepted Answer

Consumers

Answer

Producers

Question 37

Where does the majority of the Earth's oxygen come from?

Accepted Answer

Ocean

Answer

Deserts

Question 38

Which of the following best describes an organism?

Accepted Answer

A penguin

Answer

A colony (or group of penguins)

Answer

Penguins, seals, reindeer, arctic fox

Answer

Penguins, seals, reindeer, arctic fox, iceberg, rocks, cold

Question 39

Which of the following best describes a population?

Accepted Answer

A colony (or group of penguins)

Answer

Penguins, seals, reindeer, arctic fox, iceberg, rocks, cold

Answer

Penguins, seals, reindeer, arctic fox

Answer

A penguin

Question 40

Which of the following best describes a community?

Accepted Answer

Penguins, seals, reindeer, arctic fox

Answer

A colony (or group of penguins)

Answer

A penguin

Answer

Penguins, seals, reindeer, arctic fox, iceberg, rocks, cold

Question 41

Which of the following best describes an ecosystem?

Accepted Answer

Penguins, seals, reindeer, arctic fox, iceberg, rocks, cold

Answer

A penguin

Answer

A colony (or group of penguins)

Answer

Penguins, seals, reindeer, arctic fox

Question 42

Which of the following is an abiotic factor in an ecosystem?

Accepted Answer

mountain

Answer

rabbit

Answer

oak tree

Answer

coyotes

Question 43

A habitat must contain food, water, shelter, and

Accepted Answer

space to reproduce

Answer

Bugs

Answer

Penguins

Question 44

Which of the following increases the size of a population?

Accepted Answer

Births

Answer

Emigration

Answer

Deaths

Question 45

Organisms that make their own food

Accepted Answer

Producer

Answer

Consumer

Answer

Decomposer

Question 46

Organisms that obtain energy by feeding on other organisms

Accepted Answer

Consumer

Answer

Producer

Answer

Decomposer

Answer

Autotroph

Question 47

Organisms that break down wastes and dead organisms and return the raw materials to the environment

Accepted Answer

Decomposer

Answer

Consumer

Answer

Producer

Question 48

Consumers that eat only plants

Accepted Answer

Herbivores

Answer

Omnivores

Answer

Carnivores

Question 49

Consumers that eat only animals

Accepted Answer

Carnivores

Answer

Herbivores

Answer

Omnivores

Question 50

Consumers that feed on the bodies of dead organisms

Accepted Answer

Scavengers

Answer

Carnivores

Answer

Omnivores

Question 51

A food _____ is a series of events in which one organism eats another and obtains energy.

Accepted Answer

Chain

Answer

Web

Answer

Pyramid

Question 52

In the energy pyramid, what is the bottom level composed of?

Accepted Answer

Producers

Answer

Consumers

Question 53

When water falls from clouds in liquid or solid form

Accepted Answer

Precipitation

Answer

Evaporation

Answer

condensation

Question 54

Water vapor given off by plants

Accepted Answer

Transpiration

Answer

Runoff

Answer

Condensation

Question 55

What converts nitrogen gas into a usable form for plants & animals?

Accepted Answer

bacteria

Answer

car exaust

Answer

rain

Question 56

How do animals get the nitrogen they need?

Accepted Answer

from the food they eat

Answer

from the air they breathe

Answer

from the sun

Question 57

To reduce competition, the role of an organism in its habitat is called its

Accepted Answer

niche

Answer

placement

Answer

boss

Question 58

In the type of interaction called mutualism

Accepted Answer

both species benefit

Answer

one species gets harmed and the other benefits

Answer

only one species benefits

Question 59

Ticks are a great example of a relationship in which one organism lives in or on another organism and benefits from that relationship while the other organism may be harmed by it.

Accepted Answer

Parasitism

Answer

Mutualism

Answer

Commensalism

Question 60

____ are the first organisms to colonize an area and begin the process of ecological succession.

Accepted Answer

pioneer species

Answer

primary organisms

Answer

foundational organisms

Question 61

What is the main difference between primary and secondary ecological succession?

Accepted Answer

Primary begins WITHOUT soil; secondary begins WITH soil

Answer

Primary begins WITH soil; Secondary begins WITHOUT soil

Question 62

_______ is the number and variety of different species in an area.

Accepted Answer

Biodiversity

Answer

Succession

Answer

Economic

Question 63

______ is protecting and/or restoring an environment to save it.

Accepted Answer

Conservation

Answer

Regulating

Question 64

Which is NOT a way that human activities HARM the ecosystem?

Accepted Answer

Plant native species

Answer

Pollution

Answer

Overuse of resources

Answer

Removal of nature

7th Grade: Second Semester Test

81 questions

Solutions are a special kind of mixture in which .

_______ means to spread out evenly in a liquid.

In which mixture can you see all of the parts?

In which mixture can you NOT see all of the parts?

A combination of two or more substances where each keep their own properties

__________ are made up of solutes and solvents.

What is THE universal solvent?

A mixture containing small, undissolved particles that do not settle out is a(an)

A heterogeneous mixture in which particles settle is a(an)

A change in which NEW substances are formed.

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