Category 1
What is water buoyancy?
The amount of salt in water.
Why might rivers have little bits of salt
Because rivers gather a little bit of salt when transferring water from salt water bodies to other water bodies
Finish the sentence.The more salt in water the more an object will _____
float
true or false: rivers have 0% salt. Its completely fresh.
False
what bodies of water have the most salt
seas and oceans
Which objects can float in salt water
any light weight object.(pebbles, small branches, logs and etc)
What would decrease the ability of an object to float.
water with less salt.
If a cup has a third of salt and rest is water and another cup has less than a quarter of salt and rest water. If you put a light weight object in each cup, which object will float more.
the cup with a third full of salt.
What happens when salt water evaporates
salt gets left behind
what has the least amount of salt
rivers
Why do some things float and others sink?
Less dense items float, more dense sink
If a leaf floats and a key sinks, what does that tell us about their weight?
A leaf is less dense than a key.
Does a metal spoon float or sink? What about a plastic one?
Metal spoons sink. Plastic spoons may float.
Will an ice cube float in water? Why?
Frozen water is lighter/less dense than liquid water
What happens to a grape in fresh water vs. salty water?
Salty water is denser, making the grape float
Why do you feel lighter when you are swimming in a pool?
The water pushes you up
How does a huge, heavy metal boat stay on top of the water?
It displaces enough water to support its weight
Why is it easier to float in the ocean than in a pool?
Saltwater is denser
If an object floats on water, what can be said about its density compared to the density of water?
It is less than the density of water
When an object that floats is placed in a full container of water, the water level (a)
The water level goes up
How can you determine if an object will sink or float in a fluid?
If the buoyant force is equal to or greater than the weight, the object floats. If the weight is greater than the buoyant force, the object sinks.
How does the density of a floating object related to the density of the fluid it is floating in?
The density of a floating object is less than the density of the fluid it is floating in.
An empty oil tanker displaces enough water to support its weight. Why doesn't the tanker sink when loaded with thousands of tons of oil?
Oil is less dense than water, so it is still able to float.
How is buoyancy related to density?
In general, objects less dense than water will float.
If one ping-pong ball floats, will two?
Yes