Exam for prep one

Question 1: Choose the correct answer:
1-Planets revolve around the sun in …………..
a-Circular b-elliptical c-spiral d- irregular.
2-Which of the following planets has the largest gravity on its surface
a-Mercury b-Venus c- Mars d-earth
3-In addition to the sun, the solar systems includes:

a-asteroids, meteorites and comets only
b-eight planets and asteroids meteorites and comets..
c- stars and Eight planets. .
d- Eight planets only
Q2:- Write the chemical equation to the following
1 - Carbon burning in the presence of oxygen.
2- Hydrochloric acid is combined with ammonia gas.
3 Hydrochloric acid reacts with sodium hydroxide.
4- Heating copper carbonate.
Q3: What do we mean by:
chemical reaction - Symbolic equation - Endothermic and exothermic
reactions - neutralization reaction?
Question 4: Compare between each of the following:
a- The crust and mantle.
b- The sandstone rock and the limestone rock.
c- The comets and the meteors.
Q5: complete
1-electric magnet is used in making …… and ………
2-the object's weight increase as distance ………….from earth.
3- on dissolving water with acid …. Is positive ion and alkalis give ….. ion