Variables
Amanda is studying how temperature affects the rate of dissolving. In her investigation, she warms 500 milliliters (mL) of water to three different temperatures in identical beakers. She placed the same amount of material to be dissolved into each beaker.
Using the same amount of water and identical beakers is what variable?
Independent variable
Control variable
Dependent variable
Control variable
Noticing the world around you and based on your 5 senses. Causes scientists to ask questions.
Observations
Matter has ______ and takes up ______.
a. form and time
b. mass and volume
c. form and space
d. mass and space
D. mass and space
Imagine you have a bucket of salt water. Which of the following would be the best way to remove the water so that you are left with only salt?
Leave the saltwater to sit for one hour. All of the salt will settle to the bottom.
Boil the water. The water will evaporate and only the salt will remain
Freeze the salt water. The water will sink to the bottom and the salt will rise to the top.
C Boil the water. The water will evaporate and only the salt will remain
Matter in its smallest form
Atom
Amanda is studying how temperature affects the rate of dissolving. In her investigation, she warms 500 milliliters (mL) of water to three different temperatures in identical beakers. She placed the same amount of material to be dissolved into each beaker.
What is the independent variable?
A. 500 milliliters (mL) of water
B. The 3 temperatures of the water
c. The dissolving rate
B. The 3 temperatures of the water
When you draw conclusion based on an observation and on prior knowledge.
inference
What are the three form of matter?
Solid, liquid, gas
Micah is helping his uncle on an archaeological dig. His uncle gives him a bucket containing sand, rocks, and artifacts. What is the best way for Micah to separate the sand from the other materials?
Use water to dissolve the sand.
Use screen to filter out the sand.
Heat up the sand until it melts.
Boil the sand with water until it evaporates.
B. Use screen to filter out the sand.
Different atoms combine to make
Molecules
Tyler is studying the effect of different fertilizers on plants. He filled 4 pots that were the same type and size with the same amount of soil. In three of the plants, he mixes in a different type of fertilizer. In one of the pots, he does not add any fertilizer. He then plants five seeds that came from all of the same package. For the first few weeks, he will add the same amount of water to each plant every day. Once the plants have sprouted Tyler plans to measure the height of each plant every day for three weeks.
What are the independent variables?
Type of fertilizer
Information gathered from an investigation or experiment
Data or Fact
The name 3 properties of matter.
color, shape, mass, volume, texture
While at the beach, Marcus takes a shovelful of sand and adds it to a bucket of water. He stirs together the sand and water. After five minutes, what happens to the sand?
It floats to the top of the bucket.
It remains dissolved in the water.
It settles to the bottom of the bucket.
D. It settles to the bottom of the bucket.
Molecules are constantly moving and bumping into each other
Solid
Liqiud
Gas
Gas
Tyler is studying the effect of different fertilizers on plants. He filled 4 pots that were the same type and size with the same amount of soil. In three of the plants, he mixes in a different type of fertilizer. In one of the pots, he does not add any fertilizer. He then plants five seeds that came from all of the same package. For the first few weeks, he will add the same amount of water to each plant every day. Once the plants have sprouted Tyler plans to measure the height of each plant every day for three weeks.
What is the dependent variable?
Height or growth of the plants
A view or judgment formed about something, not necessarily based on fact or knowledge.
A. Data
B. Inference
C. Opinion
C. Opinion
What property would show that the matter is a gas?
a. color
b. shape
c. temperature
shape
Antonia has a bucket of salt mixed with sand that she needs to separate. What is the best way she can go about separating them?
Heat up the salt until it melts, and then drain the sand.
Pour the mixture into a screen and shake to remove the salt.
Add water to the bucket to dissolve the salt and then drain the sand.
d. Add water to the bucket to dissolve the salt and then drain the sand.
Molecules are close together but move freely
Solid
Liquid
Gas
Liquid
Ernie wants to know how different surfaces affect how a tennis ball bounces. He bounced the same tennis ball on a hard concrete surface, a hard clay surface, and a rubberized surface.
What is control variables?
The tennis balls
A Boy walks into a restaurant with a Patriots jersey on and the waiter says you must be patriots fan.
Observation or inference
inference
What property would best indicate the object is a solid?
a. odor and temperature
b. texture and shape
b. texture and shape
Antonio is at the beach and is making a sandcastle. He notices his bucket of sand has a lot of seashells in it. What tool could he use the separate the seashells out of the sand?
tongs, hands, sifter
Molecules barely move and are packed together
Solid
Liquid
Gas
Solid