astronomy
what causes earth's seasons?
Earth's tilt!
what is the thickest layer of earth?
the mantle!
what weather instrument measures precipitation?
rain gauge!
what is an insulator?
a material that resists the flow of energy, such as electricity or heat!
how long ago did the sun form?
approximately 4.6 billion years ago!
what layer of the atmosphere does weather occur?
the troposphere!
what weather instrument measures atmospheric pressure?
barometer!
what is the magnetic field?
a region of space where magnetic forces can be detected!
what was the first spacecraft lauched into space?
the Hubble space telescope!
what rock is made from lava and magma?
igneous rock!
what does an anemometer measure?
wind speeds!
what is gravity?
the force that keeps thing from floating out into space!
what was the first planet discovered?
Uranus!
what is the hottest layer of the atmosphere?
thermosphere!
what does a wind vane measure?
wind direction!
what is an electromagnet?
a type of magnet that uses electricity to create a magnetic field!
who was the first person to land on the moon?
Neil Armstrong!
(true or false)?
the stratosphere contains the ozone layer.
true!!!
what is condensation?
the process where a substance in its gaseous or vapor state changes into a liquid state!
what is the ozone layer?
a region in the Earth's stratosphere, roughly 15 to 35 kilometers (10 to 25 miles) above the surface, that contains a high concentration of ozone (O3)!