Single-celled life ruled the Earth from ________ to ________ billion years ago
Fill in the blank(s) with correct word
1; 2.5
You might also like to view...
Why is thermal escape of atmospheric gas much easier from the Moon than from Earth?
A) because the Moon's gravity is so much weaker than Earth's B) because the Moon's average surface temperature is lower than Earth's C) because the Moon lacks a global magnetic field, while Earth has one D) Outgassing on the Moon releases gases with lower masses than does outgassing on Earth.
Astronomers expect that due to friction and collisions, the particles in Jupiter's ring are slowing down and will eventually spiral into the planet.
Answer the following statement true (T) or false (F)
Suppose working outside on a hot day someone generate 450 J of heat each second. If this energy is compensated for by the evaporation of sweat, how much water would be lost in an hour? The latent heat of fusion for water is 334 kJ/kg and for vaporization is 2,200 kJ/kg
a. 4.85 liter c. 0.50 liter b. 0.74 liter d. 1.5 liter
How tightly the nucleons in a nucleus are bound together is indicated by the nucleus's
a. atomic number b. mass number c. neutron number d. half life e. binding energy