Lesson 1
Lesson 2
Lesson 3
Lesson 4
Critical Thinking
100
What are cells?
These are the building blocks of life.
100
What are leaves?
These are the structures where plants make food.
100
What are lungs?
These are structures that take in oxygen from air.
100
What is a mammal?
This is a vertebrate with hair or fur.
100
What are animals?
These are a group of living things that can move, respond, and reproduce.
200
What are organisms?
Living things are called this.
200
What are roots?
These are structures that take in water and hold a plant in place.
200
What are gills?
These are structures that take in oxygen from water.
200
What is a vertebrate?
These are animals with backbones.
200
What is chlorophyll?
This is a substance that gives leaves their green color.
300
What is reproduce?
This means to make more of one's own kind.
300
What are nutrients?
These are substances that help living things grow and stay healthy.
300
What is a shelter.
This is a safe place for some organisms to be protected.
300
What are invertebrates?
These are animals without backbones.
300
What is oxygen?
This is the gas that flows from the leaves of plants.
400
What is respond?
This is another word for react.
400
What are structures?
This is another name for the parts of an organism.
400
What are fins?
These structures help fish steer toward food and away from danger.
400
What is an exoskeleton?
This is a thin, hard covering that many animals have.
400
What is a tree trunk?
This can be tall, woody, and considered a tree's stem.
500
What is an environment?
This is all the living and nonliving things that surround an organism.
500
What is photosynthesis?
This is the process in which plants make food.
500
What is a tongue?
This is a structure that helps lions lap up water.
500
What are arthropods?
This is the biggest group of invertebrates.
500
What is a microscope?
This is a tool used to observe cells.
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