Solid, Liquid, Gas
A student is walking through a garden and observes different items in the environment. He creates this list of items he observes.
Flowers
Rain falling on flowers
Warm spring air
Wax in a beehive
Honey in a beehive
Which items on the list are solids?
Flowers, Wax
A student wants to measure the mass of a rock during a science lab. Which tool should the student use?
A Triple Beam Balance
What is magnetism?
A force that pulls magnetic objects across a distance
Which has the highest density?
Water, Oil, or Sand?
Sand
Larry has a mixture if 100 grams of water and 100 grams of soil. He leaves the mixture in the sun until the mixture is dry. He then measures the mass of the mixture. What will the new mass be?
100 grams.
Honey is thick and sticky, but it flows when you pour it. What state of matter is honey?
Liquid
A scientist measures the mass of a solid block of ice. The ice block is then left out in the sun until it melts completely into liquid water. What happens to the mass of the water?
The mass stays the same because the amount of matter did not change.
How many poles does a magnet have?
2
Describe density.
Density can be described based on an object’s ability to float or sink in water.
Define mixture.
When two or more substances are combines but do not form a new substance.
What do we call the process when an ice cube sits out on a warm counter and turns into liquid water?
Melting
Which of these objects would most likely have a mass of about 1 gram?
A paperclip
A bicycle
A heavy textbook
A desk
A paperclip
Which two items are most likely to be magnetic?
Paper
Pins
Glass
Plastic
Coins
Nails
Wood
Pins and Nails
If an object is less dense than water, what will happen when you drop it into a bucket of water?
It will float on top of the water
Define solution.
A mixture in which one substance is dissolved in another.
How does air (a gas) behave when it is pumped inside a basketball?
It spreads out to fill the entire inside space of the ball.
If you mix eggs, vegetables and cheese together when making an omlet, how does the mass of the mixture compare to the mass of the ingredients?
The mass of the mixture is the same as the mass of the eggs, vegetables, and cheese.
What should you do if you want a magnet to stick to another magnet?
Put opposite polars together.
Why does a wooden block float in water while a glass marble of the exact same size sinks?
The wood is less dense than water, while the glass is denser than water
When two materials are combined into a mixture or solution, does the total mass change?
No.
You pour a very cold glass of lemonade on a hot summer day, and soon water drops form on the outside of the glass. How did those drops get there?
Invisible water gas in the air touched the cold glass and turned into liquid water.
When using a triple beam balance, what is the first thing you must do to ensure your measurement is accurate before placing an object on the pan?
Make sure all the sliders are at zero and the pointer lines up with the zero mark.
A student tests a metal key with a magnet. They key does not move toward the magnet. What can the student conclude?
The key is not magnetic
Describe the difference between an object that is more dense than water versus an object that is less dense than water.
The object that is more dense will sink, the object that is less dense will float.
True or False: Materials in solutions are not spread evenly, and they may sink to the bottom or float to the top.
False.