Rainforests help the Earth's climate by absorbing carbon dioxide. What does ABSORB mean?
to push something out
to take something in or soak it up
to plant trees
Tropical rainforests are very dense forests that are full of trees. What does DENSE mean?
almost empty
contains a lot of things or people in a small area
extremely important
Walking on the moon was a significant moment in history for many Americans because no other person or country had landed on the moon prior to this event. What does SIGNIFICANT mean?
important
disgraceful
boring
sad
The Earth is tilted because of a giant collision 4.5 billion years ago. A Mars-sized object is thought to have crashed into young Earth. What is a COLLISION?
when two things crash into one another
an enormous planet
a race
The old wooden building started to collapse after the heavy storm weakened its walls. What does COLLAPSE mean?
to fall over, cave in, or crumble
to destroy
to build something very strong
Hundreds of years ago, sailors used to use constellations to navigate their ships at night.
to analyze the constellations
to stargaze
to drive or maneuver
Gorillas use gestures, body language, facial expressions, sounds, chest slaps, and drumming to communicate what they are thinking. What is a GESTURE?
signs or signals you make with your body
texting
somersaults
the alphabet
He has numerous rocks in his collection. He has been collecting rocks since he was 4! What does NUMEROUS mean?
important
a few
special
many
The color of human skin is determined by a substance called melanin. What does the word DETERMINED mean in this sentence?
painted by
caused by
burned by
Hibernation is when an animal becomes inactive, or sleeps, during the short, cold days of winter. What does INACTIVE mean?
bored
energetic
not active
excited
Did you know that popsicles were invented by accident? In 1905, an eleven year old boy named Frank Epperson who lived in San Francisco unintentionally invented them. What does UNINTENTIONALLY mean?
on accident or without trying to
on purpose
Cats also have flexible backbones and no collarbone. This is important because it reduces the amount of damage cats get when they fall from something tall. What does REDUCE mean?
to make something smaller
to make something more dangerous
to make something strong
to make something larger
