Chemistry
the formula of water
H2O
What is the basic unit of life?
The cell
A triangle has angles measuring 35° and 75°. What is the measure of the third angle?
70
What keeps the planets in orbit around the Sun?
Gravity
What is the name of the galaxy we live in?
The Milky Way
What gas do plants use for photosynthesis?
Carbon dioxide - CO₂
What is the largest organ in the human body?
Skin
A circle has a radius of 7 cm. What is its diameter?
14cm
what particles does an atom have?
proton, electron, neytron
What is the largest planet in our Solar System?
Jupiter
What is the hardest natural substance?
Diamond
What carries oxygen in the blood?
Red blood cells / Hemoglobin
How many faces does a cube have?
6
What are the two main types of energy?
Kinetic energy and potential energy
What do we call a giant ball of gas that emits light and heat?
A star
What is the chemical formula for methane?
CH₄
What do we call organisms that break down dead matter?
Decomposers
A cube has a volume of 125 cm³. What is the length of one side?
5cm
Which medium does sound travel fastest through: air, water, or solid?
solid
What color is the hottest type of star?
Blue
What is Avogadro’s number?
6.022 × 10²³
What type of blood vessels carry blood away from the heart?
Arteries
A triangle has sides of 7 cm, 24 cm, and 25 cm. Is it a right triangle?
Yes, because 72+242=2527^2 + 24^2 = 25^272+242=252 (49 + 576 = 625).
If you were on the Moon, would your mass change?
No, mass stays the same, but weight decreases due to lower gravity.
What is the main element that makes up the Sun?
Hydrogen