Show:
weather instruments
sound and light
force and motion
simple machines
Louisiana purchase
100
an instrument used to measure wind speed.
What is an anemometer?
100
when light hits a flat surface and rebounds off at the same angle.
What is reflection?
100
any push or pull on an object.
What is force?
100
a rope going over a wheel, carrying a heavy load.
What is a pulley?
100
a large tract of land that Thomas Jefferson bought.
What is the Louisiana purchase?
200
an instrument used to measure temperature.
What is a thermometer?
200
When light passes from one substance to another, bending as it does.
What is refraction?
200
A force that stops objects.
What is friction?
200
lengths of relatively stiff material, used for lifting weights.
What is a lever?
200
Meriwether Lewis and William Clark.
who did Jefferson send to explore the Louisiana Purchase?
300
an instrument used to measure humidity.
What is a hygrometer?
300
Only some light travels through an object.
Translucent.
300
a force that pulls objects down.
What is gravity?
300
a ramp/slide.
What is an inclined plane?
300
Sacajawea.
who did they meet?
400
an instrument used to show the direction of the wind.
What is a wind vane?
400
When no light passes through an object.
Opaque.
400
the movement of objects.
What is motion?
400
a ramp circling a stick.
What is a screw?
400
the Shoshone trib
where did Sacajawea come from?
500
an instrument used to measure atmospheric pressure.
What is a barometer?
500
When all light passes through an object.
Transparent.
500
how fast an object moves.
What is speed?
500
a stick that goes through a wheel and turns it.
What is a wheel-and -axle?
500
as a translator and a guide.
how did Sacajawea help them?