Earth and the Moon
What explains the cycle of day and night?
A. The sun revolves around the Earth every 24 hours
B. The Earth revolves around the sun every 24 hours.
C. The sun shines on Earth 12 hours a day
D. The Earth rotates on its axis and only part of Earth gets light
D. The Earth rotates on its axis and only part of Earth gets light
What is the only thing on Earth that can be found in all 3 states of matter?
What is it called in each form?
solid -> ice
liquid -> water
gas ->vaporA student puts an object on a balance. What is he measuring?
mass (weight)
What is work?
using a push or a pull to move something
How many simple machines make a compound machine?
2 or more
The seasons on Earth change because of the tilt of Earth's ____________.
axis
What kind of physical properties can be measured? Name 4.
length, mass, volume, temperature
What is a mixture?
Two or more substances combined without changing them.
What are the 6 simple machines?
lever, pulley, inclined plane, wedge, wheel-and-axle, screw
When you kick a ball, the fulcrum is your ____________.
A. foot
B. knee
C. leg
D. ball
B. knee
Tom is looking for shells on the beach. If he stays too long, the ocean water will cover the beach. What is happening while he collects shells?
A. The moon is above the ocean at his beach
B. The water is falling downhill onto the shells
C. The tide is low when he is looking for shells
C. The tide is low when he is looking for shells
What is volume? What tool measures it?
Volume is the amount of space something takes up.
It can be measured with a graduated cylinder
Give three examples of a chemical change.
digesting food, burning something, cooking, bruises, scabs, rust, leaves changing color, molding food
A light bulb uses what kind of simple machine?
screw
What is the best machine to use if you want to lift a piano from the ground to the roof of a building?
A. wheel-and-axle
B. inclined plane
C. pulley
D. lever
C. pulley
Last week was a new moon. Now the moon looks like it is getting bigger every day. What is it called when the moon is becoming full?
A waxing moon.
This state of matter always has the same volume and takes the shape of its container.
liquid
Sarah wants to find the volume of a rectangular box. What should she do?
A. Measure the length, width and height of the box, and multiply them together
B. Measure the length and height of the box, and add them together.
C. Measure the length and height of the box and multiply them together.
A. Measure the length, width and height of the box, and multiply them together
Compare wedge and screw. How are they similar? How are they different?
A screw and a wedge are both made of an inclined plane. They are different because we use a wedge to break things apart, and we use a screw to hold things together.
Name 2 compound machines you would use in a garden. What simple machines are they made of?
garden clippers: 2 levers and 2 wedges
shovel: lever and wedgeExplain the two ways the Earth moves. What cycles do these movements cause?
rotation -> causes day and night
revolution -> causes seasons
32 degrees Fahrenheit
0 degrees Celsius
What can help you separate a big box of paper clips, sponges and rocks. Explain how you would separate them.
Magnet: use a magnet to separate the paper clips from the rocks and sponges.
Water: dump the sponges and rocks into a tub of water, the sponges with float and the rocks will sink.
DO THE MATH
Karen could lift 13 pounds with a pulley. When Chris helps her, they can lift 41 pounds. When Taylor helps, they can lift 16 more pounds than that.
How many more pounds can Chris and Karen lift together than Karen can lift alone?
How many pounds could all three kids lift together?
28 pounds
57 pounds
Which is not a compound machine?
A. fishing pole
B. scissors
C. can opener
D. none of the above
D. none of the above