Which organelle is NOT found in an animal cell?
chloroplast
cell membrane
nuicleus
mitochondria
Which is a beneficial microorganism?
algae that causes red tide
staph bacteria that causes boils
fungus that causes ringworm
mold that produces penicillin
Which statement is true about plant cells?
Plant cells have no nucleus
Cytoplasm in the chloroplast makes food for the cell
Cell membrane of a plant cell is surrounded by a cell wall
plant cells are unicellular
Which microorganism does a baker add to bread dough to make it rise?
penicillin
phytoplankton
yeast
bacteria
Which microorganism turns milk into yogurt?
yeast
phytoplankton
bacteria
algae
Which of the following is NOT found in both plant and animal cells
chloroplasts
cell membrane
nucleus
cytoplasm
Which would NOT make a good insulator?
metal
rubber
plastic
cotton
What would you expect to find in an electromagnet
a coil of wire
two bar magnets
a device that uses electricity
a permanent magnet
Which would be the best choice for conducting electricity through a circuit?
wool yarn
plastic cord
pencil lead
copper wire
What kind of material should you choose if you want to stop the flow of current?
enhancer
inhibitor
conductor
insulator
Which demonstrates static electricity?
You brush your hair on a cold dry day and it sticks out
Use a charger to charge your batteries for your camera
Don't put your fingers in a socket or you'll get shocked
Bend a paperclip back and forth until it breaks and gets hot
How are a bar magnet and electromagnet alike?
they both carry a current
They both have magnetic fields
they both generate electricity
they attract each other
Which of the following will not help you separate a mixture?
evaporation
cutting
heating
filtering
As ice melts into liquid water, its temperature
varies with the environment
decreases
stays the same
increases
What kind of change occurs when ice turns to water
chemical
physical
atomic
both chemical and physical
