Body
Which organ pumps blood throughout the entire body?
The heart.
Which part of the plant is responsible for absorbing water and minerals from the soil?
The roots.
What is matter?
Matter is anything that has mass and takes up space.
What are the three things a seed needs in order to germinate and grow successfully?
Water, air (oxygen), and warmth
What causes day and night on Earth?
Earth’s rotation (spinning) on its imaginary axis, which takes about 24 hours to complete.
How do bones and muscles work together to help you move?
Muscles pull on bones to create movement. Muscles can only pull, never push, which is why they often work in pairs to bend and straighten a joint.
What gas do plants take in from the air, and what gas do they release?
Plants take in carbon dioxide and release oxygen.
What are the three main states of matter?
Solids, liquids, and gases
Where do frogs and toads typically lay their eggs?
In water.
Which planet in our solar system is closest to the Sun?
What is the difference between veins and arteries?
Arteries carry blood away from the heart, while veins carry blood back to the heart
What is the process plants use to make their own food?
Photosynthesis. Plants use sunlight, water, and carbon dioxide to create their own sugar (glucose) for energy.
How do the shapes and volumes of solids, liquids, and gases differ?
What do we call the young, water-living stage of a frog that breathes using gills and has a tail?
A tadpole.
Why does the Moon appear to be much larger and brighter than the stars in the night sky?
Because the Moon is much closer to Earth than the stars are.
What are the three main parts of the nervous system?
The brain, the spinal cord, and the nerves.
Reproduction.
What is density?
Density describes how tightly packed the matter in an object is. It is calculated by dividing an object's mass by its volume.
What is the process called when a seed begins to grow and a tiny root and shoot first appear?
Germination.
What are Saturn's rings primarily made of?
Billions of chunks of ice, rock, and dust.
What do red blood cells do?
They carry oxygen from the lungs to every cell in the body.
What pigment gives plants their green color and captures sunlight?
Chlorophyll.
Particles in a solid are tightly packed together and only vibrate in place. In a gas, particles are spread far apart, have high energy, and move quickly and freely in all directions.
What are the four main stages of complete metamorphosis?
Egg, larva, pupa, and adult.
Which layer of the Earth is located directly beneath the crust?
The mantle.