Because they are blocking light from a light source.
200
Sound travels fastest, or best, through ______________.
solids
200
What does light do when it hits a mirror.
It reflects, or bounces back.
200
This is what makes day and night.
The rotation or spinning of the earth causes day and night. This takes 24 hours.
300
Big things usually make _________________ sounds.
low-pitched
300
An object that some light can go through is _____________.
translucent
300
Sound travels slowest, or worst, through ______________.
gases
300
Explain how rainbows form in the sky.
Sunlight hits tiny droplets of water in the sky. The light refracts, and breaks the light ray into all of the colors that make it-- the color spectrum.
300
This system is responsible for transporting oxygen to all parts of the body. It carries the oxygen in the blood.
the circulatory system
400
Describe the sound of an ambulance siren in two ways.
An ambulance siren is loud and high-pitched.
400
Name all of the colors of the color spectrum in order.
red, orange, yellow, green, blue, indigo, violet
400
Why does thunder come after lightning?
Because sound travels much slower than light.
400
If you were in a large field and your friend was a mile away, and they flashed a bright light and crashed a cymbal at the same time, which would your senses pick up first? Why?
Your senses would notice the light first, because light travels faster than sound.
400
A piece of land that is surrounded by water on all sides is called a(n) _________________.
island
500
Small things make high-pitched sounds because they vibrate _________________.
faster
500
Give three reasons why we need sunlight.
We need light to see, we need its heat, and we need Vitamin D. Plants need sunlight in order to grow, and we need plants to eat.
500
Let's pretend that I have a really hard time waking up in the morning. Knowing how sound travels through different states of matter, what could I do with my alarm clock so that I could hear it better?
Answers vary.
500
Why do red things look red to us?
Because white light hits the object, and all of the colors are absorbed except for red. The red reflects back at you.
500
This is where you look to see the sun rise in the morning.