Periodic table
What is the symbol for oxygen?
O
What do we call the number of vibrations per second?
Frequency
What is the speed of light in air
About 300,000,000 m/s
What is a balanced diet
a diet with the right amounts of all nutrients
What is a chemical change?
A change that produces a new substance
What are the rows on the periodic table called?
Periods
What is a sound measured in
Decibels
Ghat happens to light when it hits a mirror
It reflects
What does proteins help your body do
Grow and repair cells
Give one sign if a chemical reaction
A color change, gas or temperature change
Name one property of metals and one of non-metals.
Metals: conduct electricity; Non-metals: poor conductors.
What kind of wave is a sound wave
Longitudinal wave
What is refraction
Bending of light when it moves through different materials
Beat is the function of the lungs
To take in oxygen and remove carbon dioxide
Is melting a chemical change or a physical change
Physical change
Why are the noble gases unreactive?
What happens to sound when it hits the wall
It reflects
Name the colors of the rainbow in order
Red, Orang, Yellow, Green, Blue, Indigo, violet
Name one short term effect of smoking
coughing or shortness or breath
What is formed during burning
New substance like carbon dioxide
What do elements in the same group have in common?
They have the same number of electrons in their outer shell.
Why can’t sound travel to space
Here are no particles to carry the vibration
Buy does a red object look red
T reflects red light and absorbs other colors
Why is exercise important for the body
It keeps the heart and muscles healthy.
Name a fast and slow chemical change
explosion(fast) rusting(slow)