All elements are composed of extremely small particles called
molecules
atoms
compounds
electrons
The atomic number of an element is based on the ____________.
number of electrons
number of protons
number of neutrons
the number of nuclei
What part of the brain controls memory?
cerebellum
cerebrum
brainstem
spinal cord
What is a neuron?
brain cell
skin cell
nerve cell
blood cell
The automatic response of the body that occurs rapidly is a
reaction
behavior
breath
reflex
Arteries take blood
to the heart.
away from the heart to the body.
to the lungs.
away from the lungs.
Veins take blood
to the heart
to the body
to the skin.
Check the boxes that are examples of chemical changes.
Burning a piece of paper.
Ripping up a piece of paper.
Melting ice.
Baking a cake.
A nail rusting.
Check the examples of a physical change.
Breaking a glass
Ice melting.
ripping up a piece of paper.
In a neutral atom, the number of protons equals the number of
neutrons
nuclei
Check the boxes of the particles found in the nucleus of an atom.
electron
nuetron
proton
The powerhouse of the cell is the
nucleus
vacuole
mitochondria
cell membrane
Mark all of the correct answers. The process of photosynthesis takes place
in an animal cell.
in a plant cell.
in a mitochondria
in a chloroplast.
Most digestion(processing of nutrients) takes place in the
stomach
mouth
large intestine
small intestine
What is the muscular tube that squeezes food down into the stomach called?
wind pipe
esophagus
colon
These produce a fluid that enters the mouth and begins digestion of some starches
salivary glands
liver
eyes
