Periodic table
Elements Compounds
Elements Compounds
What is the name of the compound made from hydrogen and oxygen that is essential for life?
water H2O
Which star is the closest to Earth and is the center of our solar system?
Sun
Why does mass stay the same on every planet but weight changes?
Mass is the amount of matter in an object, while weight depends on the gravity of the planet.
What is the name of the compound made of sodium and chlorine?
sodium chloride or salt
What is the name of the planet that is known for its strong gravity, making things weigh much more than on Earth?
Jupiter
What gas do plants need for photosynthesis?
CO2
Suggest the names of the compounds with these formulae: MgO, NaCl, CaS
magnesium oxide, sodium chloride, calcium sulfide
What is the term for the force that causes objects to fall to the ground, such as a ball dropped from your hand?
Gravity
What is the name of the galaxy we live in?
The Miky Way