Chemical reactions
What are reactants?
What is an atom?
It is the smallest unit into which matter can be divided without the release of electrically charged particles.
Sound travels fastest through this state of matter
solids
This is what light does when it hits a mirror.
reflect
A polar bear’s white fur is an example of this.
an adaptation
What is oxidation?
When iron reacts with oxygen and forms rust, this is the name of the process.
Sodium (Na) and Potassium (K) are soft, reactive metals that explode in water. What group are they in?
Group 1
This is the highness or lowness of a sound
pitch
These are the colors of the rainbow in order
red, orange, yellow, green, blue, indigo, violet
his is the passing of traits from parents to offspring.
heredity
What is carbon dioxide?
a clear gas composed of one atom of carbon (C) and two atoms of oxygen (O)
Calcium (Ca) and Magnesium (Mg) are less reactive than Group 1 metals but still form strong bases. What group are they in?
group 2 alkaline metals
These are sound waves too high for humans to hear.
Ultrasonic waves
This happens when light bends as it passes through water.
refraction
If a brown-eyed parent and a blue-eyed parent have a brown-eyed child, brown is this type of trait.
dominant trait
What is an exothermic reaction?
reaction that releases heat
Fluorine (F) and Chlorine (Cl) are highly reactive gases that bond with metals to form salts. What group are they in?
group 17 halogens
When sound bounces back to you (like in a cave)
echo
A black shirt does this to light
absorbs lights
A cactus storing water in its stem is an example of this type of adaptation.
structural adaptation
What is an endothermic reaction?
a reaction that absorbs heat
What are transition metals?
This group of metals is found in the middle of the periodic table, is highly conductive, and includes iron, gold, and copper. They often form colorful compounds
This part of the ear vibrates when sound hits it (hint: it’s a thin membrane).
eardrum
This is why a straw looks bent in a glass of water.
light refraction
This is the term for a change in DNA that can create new traits.
a mutation