Science Vocabulary

Question 1

What is a unicellular organism?

Answer 1

An organism that consists of only one cell.

Question 2

What is a multicellular organism?

Answer 2

Organisms that consist of more than one cell.

Question 3

Define organism.

Answer 3

Any living thing.

Question 4

What is the function of the circulatory system?

Answer 4

Brings materials to cells, fights infection, and helps to regulate blood flow.

Question 5

What does the respiratory system do?

Answer 5

Provides oxygen and removes carbon dioxide.

Question 6

What are the main functions of the skeletal system?

Answer 6

Gives the body shape, protects organs, and works with muscles to move the body.

Question 7

What is the role of the muscular system?

Answer 7

Helps produce voluntary movement, circulate blood, and move food.

Question 8

What is the purpose of the digestive system?

Answer 8

Converts food so it can be used by cells as energy.

Question 9

What does the nervous system coordinate?

Answer 9

The body’s response to changes in its internal and external environments.

Question 10

What are arteries and veins?

Answer 10

The tubes that blood moves through throughout the body.

Question 11

What does DNA contain?

Answer 11

All of the information necessary to build and maintain an organism.

Question 12

What do genes determine?

Answer 12

What your body looks like.

Question 13

Define offspring.

Answer 13

The children of a species.

Question 14

What is the cardiovascular system?

Answer 14

The circulatory and respiratory system working together.

Question 15

What does ‘terrestrial’ refer to?

Answer 15

Land-based ecosystem.

Question 16

What does ‘aquatic’ refer to?

Answer 16

Water-based ecosystem.

Question 17

What is an estuary?

Answer 17

Where freshwater and saltwater meet.

Question 18

What characterizes a salt marsh?

Answer 18

An aquatic ecosystem with tall grasses.

Question 19

What does ‘fertile’ mean?

Answer 19

Lots of vitamins and nutrients.

Question 20

Define species.

Answer 20

A group of animals or plants that are similar.

Question 21

What is a deciduous forest?

Answer 21

A forest ecosystem with many trees that has 4 seasons.

Question 22

Describe a rainforest.

Answer 22

An ecosystem with trees and plants, hot and humid, little sunlight at the floor.

Question 23

What are grasslands?

Answer 23

Ecosystem with short grasses and shrubs.

Question 24

What characterizes a tundra ecosystem?

Answer 24

Very cold and the ground is frozen.

Question 25

What is a taiga?

Answer 25

An ecosystem with cool temperatures and trees with needles as leaves.

Question 26

What is a food chain/web?

Answer 26

A visual to show the flow of energy from producers to consumers.

Question 27

Define producers in an ecosystem.

Answer 27

Plants and algae that use the sun's energy to produce food.

Question 28

What are consumers?

Answer 28

Organisms that cannot make their own food and get energy from other organisms.

Question 29

What is a population?

Answer 29

All the populations living in an area.

Question 30

What does 'biotic' refer to?

Answer 30

Living parts of an ecosystem.

Question 31

What does 'abiotic' refer to?

Answer 31

All of the nonliving parts of an ecosystem.

Question 32

What is an omnivore?

Answer 32

Animals that eat both plants and animals.

Question 33

Define carnivore.

Answer 33

Animals that eat other animals.

Question 34

What is a herbivore?

Answer 34

Animals that eat producers.

Question 35

What is a habitat?

Answer 35

Place where an organism lives.

Question 36

Define biome/ecosystem.

Answer 36

All the living and nonliving things in an area.

Question 37

What does 'extinct' mean?

Answer 37

Having no members of the species living.

Question 38

What does 'endangered' refer to?

Answer 38

A species whose numbers are so few that it may soon become extinct.

Question 39

Define prey.

Answer 39

Hunted for food.

Question 40

What are predators?

Answer 40

Organisms that hunt other living things for food.

Question 41

What is gravity?

Answer 41

The force that pulls objects to Earth.

Question 42

Define friction.

Answer 42

The force applied in the opposite direction of an object's movement.

Question 43

What is mass?

Answer 43

The amount of matter in an object.

Question 44

What is deceleration?

Answer 44

To decrease the velocity of an object.

Question 45

Define acceleration.

Answer 45

Changing the velocity of an object.

Question 46

What is force?

Answer 46

A push or pull.

Question 47

What does motion refer to?

Answer 47

Movement.

Question 48

Define momentum.

Answer 48

The motion of an object and its resistance to slowing down.

Question 49

What is velocity?

Answer 49

The speed and direction of an object.

Question 50

What is inertia?

Answer 50

The tendency of an object to keep doing what it is doing.

Question 51

State Newton's 1st Law.

Answer 51

An object at rest will stay at rest, and an object in motion will stay in motion unless a force acts on it.

Question 52

State Newton's 2nd Law.

Answer 52

The more mass an object has, the more force needed to cause acceleration.

Question 53

State Newton's 3rd Law.

Answer 53

For every action, there is an equal and opposite reaction.

Question 54

What is air resistance?

Answer 54

Friction in the air that can slow the motion of an object falling through the air.

Question 55

Define speed.

Answer 55

How fast an object is moving in a certain amount of time.

Question 56

What are balanced forces?

Answer 56

Equal and opposite forces that cancel each other out.

Question 57

What are unbalanced forces?

Answer 57

Unequal and opposite forces that can cause a change in an object's motion.

Question 58

Define conduction.

Answer 58

Heat transfer through direct contact.

Question 59

What is convection?

Answer 59

Heat transfer through a liquid or gas.

Question 60

Define radiation.

Answer 60

Heat transfer through empty space using infrared rays.

Question 61

What is a convection cell?

Answer 61

Warm molecules rising and cool molecules sinking.

Question 62

Define conductor.

Answer 62

A material that moves heat well.

Question 63

What is an insulator?

Answer 63

A material that does not move heat well.

Question 64

What is temperature?

Answer 64

The measurement of how hot or cold something is.

Question 65

What is heat?

Answer 65

How fast molecules are moving.

Question 66

What is the sun's role in the water cycle?

Answer 66

The driving force of the water cycle.

Question 67

Define evaporation.

Answer 67

The slow changing of a liquid into a gas.

Question 68

What is transpiration?

Answer 68

The loss of water through a plant's leaves.

Question 69

What is condensation?

Answer 69

Changing of a gas into a liquid.

Question 70

What is precipitation?

Answer 70

Any form of water particles that falls from the atmosphere and reaches the ground.

Question 71

What is runoff?

Answer 71

Precipitation that flows across the land's surface or falls into rivers and streams.

Question 72

What is a qualitative observation?

Answer 72

An observation using the 5 senses.

Question 73

What is a quantitative observation?

Answer 73

An observation using measurements of numbers.

Question 74

Define matter.

Answer 74

Anything that has mass or takes up space.

Question 75

What is a chemical change?

Answer 75

A change of matter that creates a new substance.

Question 76

What is a physical change?

Answer 76

A change of matter in size, shape, or state without changing its identity.

Question 77

Define gas.

Answer 77

A state of matter that has no definite shape and whose molecules move freely.

Question 78

What is a solid?

Answer 78

A state of matter that has a definite shape and whose molecules are closely packed.

Question 79

What is a liquid?

Answer 79

A state of matter that takes the shape of its container.