Quiz about Pratt 7th grade science semester review

Question 1

What is a sign that a chemical change has occurred?

Accepted Answer

The production of heat, light, or smoke is observed.

Answer

The physical properties are the same.

Answer

The state of the matter has changed.

Answer

The substance seems to have disappeared.

Question 2

Examples of chemical properties include __________.

Accepted Answer

flammability and reactivity

Answer

length and mass

Answer

melting point and boiling point

Answer

color and shape

Question 3

Matter takes up __________and has__________.

Accepted Answer

space; mass

Answer

space; heat

Answer

space; temperature

Answer

heat; temperature

Question 4

Which is a physical property?

Accepted Answer

Color

Answer

ability to rust

Answer

reactivity with oxygen

Answer

flammability

Question 5

Which of the following is not made of matter?

Accepted Answer

Light

Answer

Dirt

Answer

Air

Answer

Water

Question 6

What is a well-tested concept that explains a wide range of observations?

Accepted Answer

science theory

Answer

scientific inquiry

Answer

scientific inference

Answer

scientific observation

Question 7

Measurements of the heights of various plants in an experiment are called

Accepted Answer

data

Answer

inferneces

Answer

inquiries

Answer

theories

Question 8

Which of the following helps scientists all over the world communicate about experimental results with one another

Accepted Answer

They all use the International System of Units

Answer

they all speak English

Answer

they all use an English System of Measurement

Answer

they all speak Latin

Question 9

When you analyze a table of measurements taken during an experiment, you are

Accepted Answer

interpreting data

Answer

manipulating variables

Answer

making theories

Answer

posing questions

Question 10

When a scientist shares his or her findings with other scientists, they are

Accepted Answer

communicating

Answer

experimenting

Answer

hypothesizing

Answer

theorizing

Question 11

A possible explanation for a set of observations is known as a

Accepted Answer

hypothesis

Answer

theory

Answer

variable

Answer

conclusion

Question 12

Which sentence best describes a scientific theory

Accepted Answer

it is a well-tested and explains a wide range of observations

Answer

it can never change

Answer

it can change every time it is tested

Answer

it can be proven conclusively

Question 13

What characteristic must be true of a good hypothesis

Accepted Answer

it must be testable by observation or experiment

Answer

it must involve quantitative data

Answer

it must have been observed many times

Answer

it must be correct

Question 14

A chart showing the amount of rain each month in a region is an example of a scientist's

Accepted Answer

data

Answer

inferences

Answer

conclusions

Answer

variables

Question 15

A hypothesis is a

Accepted Answer

possible explanation for observations

Answer

factor that is changed during an experiment

Answer

factor that stays the same during an experiment

Answer

the use of one or more senses to gather information

Question 16

Kinetic energy increases as

Accepted Answer

both mass and velocity increase

Answer

mass decreases and velocity increase

Answer

mass increases and velocity decreases

Answer

both mass and velocity decrease

Question 17

The energy associated with motion is call

Accepted Answer

kinetic energy

Answer

gravitational potential energy

Answer

nuclear energy

Answer

elastic potential energy

Question 18

The ability to do work is called

Accepted Answer

energy

Answer

friction

Answer

conversion

Answer

velocity

Question 19

The measurement of the force of gravity on an object is the object's

Accepted Answer

weight

Answer

density

Answer

volume

Answer

mass

Question 20

The SI unit for mass is the

Accepted Answer

kilogram

Answer

ounce

Answer

liter

Answer

pound

Question 21

All of the following are examples of properties EXCEPT

Accepted Answer

symbols

Answer

hardness

Answer

color

Answer

flammability

Question 22

In chemistry elements are represented by

Accepted Answer

symbols

Answer

formulas

Answer

building blocks

Answer

ratios

Question 23

All elements are composed of extremely small particles called

Accepted Answer

atoms

Answer

molecules

Answer

compounds

Answer

mixtures

Question 24

The process of burning a fuel is called

Accepted Answer

combustion

Answer

acceleration

Answer

conduction

Answer

meltdown

Question 25

The measurement of how much mass is contained in a given volume is called

Accepted Answer

density

Answer

weight

Answer

liter

Answer

kilogram

Question 26

To use a combination of materials to create something new

Accepted Answer

produce

Answer

source

Answer

autotroph

Answer

heteroph

Question 27

The process by which plants and other autotrophs capture and use light energy to make food from carbon dioxide and water

Accepted Answer

photosynthesis

Answer

fermentation

Answer

cellular respiration

Answer

equation

Question 28

A place where something comes from or begins

Accepted Answer

source

Answer

equation

Answer

photosynthesis

Answer

produce

Question 29

Which organism is NOT a heterotroph

Accepted Answer

tomato plant

Answer

rabbit

Answer

catfish

Answer

bear

Question 30

What organelle is known as the "powerhouse" of the cell

Accepted Answer

mitochondria

Answer

chlorophyll

Answer

chloroplast

Question 31

What provides the energy for  the photosynthesis process

Accepted Answer

sunlight

Answer

glucose

Answer

carbon dioxide

Answer

oxygen

Question 32

What is the name of the green photosynthetic pigment in a plant cell

Accepted Answer

chlorophyll

Answer

chloroplast

Answer

mitochondria

Answer

nucleus

Question 33

identify one reason why all plants need energy

Accepted Answer

to produce new cells and structures

Answer

to absorb oxygen

Answer

to absorb sunlight

Answer

to release carbon dioxide

Question 34

_______ is a chemical that captures energy for photosynthesis

Accepted Answer

chlorophyll

Answer

glucose

Answer

carbon dioxide

Answer

lactic acid

Question 35

What makes up all types of matter in living and nonliving things in an ecosystem

Accepted Answer

atoms and molecules

Answer

cells

Answer

sunlight

Answer

calcium and oxygen

Question 36

Rain, hail, and snow are all examples of

Accepted Answer

precipitation

Answer

condensation

Answer

evaporation

Answer

erosion

Question 37

Which part of the water cycle involves water turning from a gas into a liquid

Accepted Answer

condensation

Answer

precipitation

Answer

evaporation

Answer

erosion

Question 38

Mushrooms and bacteria are important

Accepted Answer

decomposers

Answer

predators

Answer

producers

Answer

herbivores

Question 39

A food chain or food web shows the flow of energy and matter through an ecosystem. Which organisms use the sun's energy and make it available to other organisms

Accepted Answer

producers

Answer

carnivores

Answer

decomposers

Answer

herbivores

Question 40

The first species to populate an area during succession is called

Accepted Answer

pioneer species

Answer

colonize

Answer

dominate

Answer

succession

Question 41

Species that are not native to a habitat are called

Accepted Answer

invasive species

Answer

keystone species

Answer

biodiversity

Answer

extinction

Question 42

Anything naturally occurring in the environment that humans use is called

Accepted Answer

natural resource

Answer

conservation

Answer

sustainability

Answer

regulation

Question 43

The study of how organisms interact with each other and the environment is called

Accepted Answer

ecology

Answer

ecosystem services

Answer

natural resource

Answer

conservation

Pratt 7th grade science semester review

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