Biology
What is the basic unit of life?
The Cell
What is an atom?
Smallest unit of an element that retains its properties
What is electricity?
Flow of electric charge (usually electrons)
What force keeps planets in orbit around the Sun?
Gravity
What gas do humans need to breathe to survive?
Oxygen
Name two organelles found in plant cells but not animal cells.
Cell wall, chloroplasts
The atom is made of 3 things, name them and their charge.
Proton (+), Electron (-) and Neutron (neutral)
What is a current?
Flow of charge
How many planets in the solar system?
8
What is H₂O commonly known as?
Water
What is the function of the cell membrane?
Controls what enters and leaves the cell
You can identify a chemical change because?
A new substance forms
What device is used to measure electric current?
Ammeter
What tool do astronomers use to observe distant space objects?
Telescope
What part of the body pumps blood?
Heart
How does a microscope help us study cells?
Magnifies tiny objects so cells and organelles can be seen
An Ionic Bond is a bond that ________ electrons.
Ionic = electron transfer
What is the role of a power source in a circuit?
Provides energy to move charges
Why does the Moon appear to change shape during the month?
Moon’s position relative to Earth and Sun
What do plants use from sunlight to make their food?
Energy for Photosynthesis
What is the difference between a tissue and an organ?
Tissue = group of similar cells; Organ = group of tissues working together
Why are noble gases unreactive?
Full outer electron shell
Why does adding more resistors in series reduce current?
Total resistance increases → current decreases
What is a light-year a measure of?
Distance light travels in one year
What force pulls objects toward the ground?
Gravity