What is a Cell?
What is a cell?
The smallest unit of life.
What does a microscope do?
Makes tiny things look bigger.
What strong outer layer do plant cells have?
Cell wall.
Do animal cells have a cell wall?
No.
How many seasons does Earth have?
Four.
What causes day and night?
Earth’s rotation.
Does the Moon make its own light?
No.
What is a planisphere?
A star map of the night sky.
What tool do scientists use to see cells?
A microscope.
What part bends light to magnify objects?
Lens.
What green part makes food?
Chloroplast.
What is the powerhouse of the cell?
Mitochondria.
What causes seasons?
Earth’s tilt and orbit around the Sun.
How long is one Earth rotation?
24 hours.
How long does one Moon cycle take?
About 29.5 days.
What does a constellation show?
A pattern of stars.
What do we call living things made of one cell?
Unicellular organisms.
Why do microscopes need light?
To see the specimen clearly.
What part stores water and food?
Vacuole.
What shape are animal cells usually?
Round or oval.
What is Earth tilted on?
Its axis.
Why does the Sun look like it moves across the sky?
Earth is rotating.
What phase shows the whole Moon bright?
Full Moon.
Why do constellations change with seasons?
Earth moves around the Sun.
Which part of the cell controls what the cell does?
The nucleus.
How many times can some microscopes magnify?
Up to 1000 times.
Name two parts plant cells have that animal cells do not.
Cell wall and chloroplasts.
What do ribosomes make?
Proteins.
What season has the longest days?
Summer.
What happens if Earth stops rotating?
One side always day, one side always night.
What is a thin curved Moon called?
Crescent Moon.
What line separates sky and land?
Horizon.
Explain the difference between unicellular and multicellular organisms.
Unicellular have one cell; multicellular have many cells.
Explain how a microscope works.
Light passes through the specimen and lenses magnify it.
Why are chloroplasts important for life on Earth?
They make food and oxygen.
Name two jobs animal cells do in the body.
Movement, repair, energy, protection (any two).
Explain how tilt and orbit work together to make seasons.
Tilt changes sunlight while Earth orbits the Sun.
Explain rotation in your own words.
Earth spins on its axis causing day and night.
Explain why the Moon looks different each night.
We see different parts of the lit side as it orbits Earth.
Explain how a planisphere helps find stars.
It shows visible stars for a date and time.