Cells & Organelles
Specialized Cells & Functions
Atoms & Elements
Periodic Table & Reactivity
Light & Shadows
Sound & Hearing
Gravity & Space
100
What is the basic unit of life?
Cell
100
True or False: All living organisms are made of cells.
True
100
What 3 particles make up an atom?
Protons, neutrons, electrons
100
What does the periodic table organize?
All known elements
100
Light travels in a __________ line at a fixed speed.
Straight
100
What makes sound?
Vibrating Objects
100
What does gravity do to all masses?
Pulls them toward each other
200
What are the two main types of cells: one with one cell, one with many?
Unicellular and multicellular
200
What do we call a group of similar cells working together?
Tissue
200
What charge does a neutron have?
Neutral (no charge)
200
Are metals found on the left or right side of the table?
Left
200
Why do we see shadows?
Light can't pass through objects (it is blocked)
200
What unit is used to measure frequency of sound?
Hertz (Hz)
200
Which has more gravity: a large or small mass?
Large mass
300
Name 3 organelles found in both plant and animal cells.
Nucleus, cell membrane, cytoplasm
300
What is diffusion and why is it important for cells?
Movement of molecules from high to low concentration; helps cells get nutrients and remove waste
300
What is the difference between an element and a compound?
Element = one type of atom; Compound = two or more different atoms bonded
300
Name one trend in reactivity as you go down Group 1.
Reactivity increases
300
Why do we see things before we hear them?
Light travels faster than sound
300
Describe a longitudinal wave.
A wave where particles move back and forth in the same direction as the wave
300
What force keeps planets orbiting the Sun?
Gravity
400
What is the function of the mitochondria?
Produces energy for the cell (site of respiration)
400
How do oxygen and carbon dioxide move in and out of cells?
By diffusion
400
How many atoms are in the formula C₆H₁₂O₆?
24 atoms total (6 C, 12 H, 6 O)
400
Compare a metal and a non-metal’s properties.
Metals are shiny, conduct heat; non-metals are dull, poor conductors
400
What is the law of reflection?
Angle of incidence = angle of reflection
400
Why does sound travel fastest in solids?
400
What is the difference between a day and a year on a planet?
Day = one spin (rotation); Year = one orbit around the Sun
500
Describe one way a plant cell is different from an animal cell.
Plant cells have a cell wall and chloroplasts; animal cells do not.
500
How is a red blood cell’s shape adapted to its job?
It is biconcave to increase surface area for oxygen transport.
500
How are electrons arranged in an atom?
In energy levels (shells) around the nucleus
500
Why does an atom's reactivity depend on its outer electrons?
Atoms react to gain or lose outer electrons to become stable
500
What happens when light hits a flat mirror?
It reflects at the same angle it came in (reflection)
500
What’s one permanent effect of loud noise on the ear?
Hearing loss
500
What causes eclipses?
When the Moon or Earth blocks light from the Sun