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100
Why does the temperature matter for hatching turtle eggs?
Because if the temperature is above 88F there won't be any boys, so there won't be any babies.
100
In what way do viruses "reproduce" that is very different from the way living things reproduce?
Viruses use the genetic material from their host's cells to replicate themselves.
100
Based on what we have learned about sound, how would you be able to tell, between a violin and a cello, which one makes the higher pitched music?
....and which one is it?
The smaller instrument makes a higher pitched sound, so it is the violin.
100
If someone claps their hands 5 feet away from your face, do the air particles closest to their hands get all the way to your ear?
No, because the air particle closest to their hands pushes another particle, which pushes another particle, and so on and so on, until it pushes one near your ear to your ear.
200
He is slowly growing every day, and will be a giant in millions of years.
He uses lots of energy, but he also makes lots of energy.
....but is he alive? Why or why not?
Helios the Sun, like all stars, is not alive
200
I can do things when you tell me to do them.
I can move. I go to sleep. I can play soccer.
I can deliver and receive bits of information.
.......but am I alive?
No, robots are not alive.
200
Why would you not be able to hear a cell phone in a vacuum chamber?
Because there are no air particles in the vacuum chamber for the phone's sound to make vibrate.
200
Explain why it was not wind that made the girl's hair fly like this?
Her hair is moving because of air pressure generated from the speakers and subwoofers in the car. There is a lot of air around her moving back and forth and it moves her hair.
300
What is the difference between sexual and asexual reproduction?
Sexual reproduction requires two parents and gives birth to genetically diverse offspring. Asexual reproduction requires only one parent, and the offspring is an genetic replica of that parent.
300
Why does it matter that the heat source be above the turtle eggs?
Because the heat source has to be above the egg just like Helios the Sun.
300
Why do men usually have deeper singing voices than women do?
Because, usually, men have thicker vocal cords than women do.
300
If you watch a movie with spaceships and astronauts in space, and there is a loud explosion, what's wrong with that movie?
There is no air in space, so there is no sound in space. You should not be able to hear the explosion.
400
They appear on bread and fruit, and sometimes in your basement or bathroom
They can spread by growing or by spores
They can decompose different things
.....but are they alive?
Yes, mold, like all fungi, are alive
400
I just sit there. Sometimes I have to be cut.
I don't really do anything in the winter time.
I don't really move, but I produce something that makes you sneeze.
..... am I alive?
Grass, like all plants, is alive.
400
True or false: Sounds can travel through gasses, liquids, and solids.
True
400
When you were swimming in a pool, or get water in your ears, why do things sound different?
Because water has a different density than air, and water particles don't move at the same frequency air particles.
500
Everything in the universe is made of atoms, but only these things are made of cells.
Living things
500
The ability of living things to break food to make simpler chemicals and energy is called what?
Metabolism
500
Since I noticed a few people are struggling with this...
What is the difference between frequency and amplitude?
Amplitude refers to how loud something is and how far the object is deformed. Frequency refers to how high or low pitched something is and how frequently it is moving.
500
Without touching a piano, How can you tell which will make low pitch noises versus which keys will make high pitched noises?
The keys on the left side of the piano have longer, thicker strings. The keys on the right side of the piano have shorter, thinner strings.