Show:
Simple Machines
Motion
Moon Cycle
Rotation/Revolution
Random
100
A camper needs to chop some firewood. Which simple machines can be used to complete the task?
What is a wedge and lever?
100
Which of the following will most likely slow down a rolling ball? A) rolling off a curb onto the street B) rolling from concrete onto grass C) rolling down an inclined plane D) rolling in the same direction as the wind
What is rolling from concrete onto grass?
100
Why does the moon's appearance change each night?
What is we see the side that is lit by the sun from different angles?
100
What causes day and night?
What is Earth's rotation on its axis?
100
Jim needs to pick up a coin that has rolled under his refrigerator. Which will best help him with this task? A) a light bulb B) tape C) a magnifying glass D) a wire coat hanger
What is a wire coat hanger?
200
Which simple machines allow scissors to cut paper?
What is wedges?
200
Which of the following will most likely increase an airplane's speed? A) water vapor B) tailwind C) friction D) gravity
What is tailwind?
200
Why does the moon's appearance change over the course of a lunar cycle? A) Earth takes about 28 days to rotate on its axis. B) Earth takes about 28 days to orbit the moon. C) The moon takes about 28 days to rotate on its axis. D) The moon takes about 28 days to orbit Earth.
What is the moon takes about 28 days to orbit Earth?
200
The sun is rising in California. How far will Earth have to rotate so that it will be sunset in California?
What is half a rotation?
200
A plumber needs to pick up a screw that has dropped in the drain. Which group of materials will best help him retrieve the screw? A) a ruler and tape B) a hammer and nails C) a string and magnet D) a tape measure and knife
What is a string and magnet?
300
Which simple machines allows a clock to keep time?
What is gears?
300
A skydiver jumps from an airplane. What is the effect of gravity on the skydiver's motion? A) Gravity lifts him upward. B) Gravity causes him to rotate. C) Gravity increases his speed. D) Gravity moves him sideways.
What is gravity increases his speed?
300
The right half of the moon is lit up. What is this moon called?
What is first quarter?
400
A rancher needs to lift a load of hay to the second floor of his barn. Which simple machine can be used to complete the task?
What is a pulley?
400
Which of the following will most likely slow down a bicyclist? A) riding on a concrete surface B) putting oil on the chain before riding C) pedaling up a hill D) traveling downwind
What is pedaling up a hill?
400
The left side of the moon is dark and the right side of the moon is lit up. Which phase is the moon in?
What is first quarter?
400
What is a likely effect of a tornado on a habitat? A) Heavy rains may create new lakes. B) Strong winds may knock down trees. C) Clouds may block sunlight from a habitat. D) Cold temperatures may freeze plants' leaves.
What is strong winds may knock down trees?
500
A student needs to fasten two boards together. Which simple machine can be used to complete the task?
What is a screw?
500
Tim dropped a basketball from the top of a ladder. Then he threw the same ball toward the ground from the top of the ladder. What is the effect of the throwing force on the ball's motion? A) The ball bounces fewer times. B) The ball bounces higher. C) The ball travels slower. D) The ball becomes flat.
What is the ball bounces higher?
500
The entire moon is fully lit up. What phase of the moon is this?
What is full moon?
500
Which of the following best explains why the sun is setting in China when it is rising in the United States? A) The United States is always slightly closer to the sun than China. B) The Northern Hemisphere of Earth rotates at a faster rate than the Southern Hemisphere of Earth. C) Earth's axis is tilted so that as Earth revolves around the sun, different parts of the planet face the sun at different times of the year. D) Earth rotates in such a way that as one half of the planet moves to face the sun, the other half moves to face away from the sun.
What is Earth rotates in such a way that as one half of the planet moves to face the sun, the other half moves to face away from the sun?
500
Which of the following best explains why peer review is important? A) It provides suggestions for improvement before research is published. B) It encourages scientists to write more research papers. C) It makes sure scientists receive money for future experiments. D) It informs the public about research being done by scientists.
What is it provides suggestions for improvement before research is published?