Matter is Everywhere
Anything that has mass and takes up space is called...
matter
This describes how hot or cold something is
temperature
The heaviness of an object or the measure of its pull of gravity is called...
Weight
This is a liquid mixture where one substance is mixed evenly throughout another substance.
Solution
This means to use your senses (sight, smell, etc.) or tools to gather information about something.
Observe
This means to spread out evenly in a liquid
dissolve
The size, length, or amount of something is called its...
measurement
When baking soda and vinegar are mixed, a new substance and gas are formed. This is known as a...
chemical reaction or chemical change
This is a combination of two or more substances where each keeps its own properties and both can be easily separated.
Physical change
This is a representation (like a drawing or a small-scale object) used to explain or describe something, such as the arrangement of tiny particles in matter.
Model
When sugar is added to water, it forms a solution. Name one way you can use your senses to tell that the sugar is still there, even when you can no longer see it.
Taste it, boil the water and see the sugar left behind, etc.
Name three physical properties that describe a paper clip.
Metal, small, bendable/flexible, magnetic, silver, smooth, etc.
When lemon juice and baking soda are mixed inside a closed plastic bag, a chemical change occurs. When this happens, the mass...
stays about the same
When the mixing of two substances results in a temperature change, what has most likely occurred?
This scientific law states that matter cannot be created or destroyed; the total amount (weight) of matter stays the same even when it changes form.
Matter Conservation or Conservation of Matter
This tool can help us see the particles that make up matter.
microscope
Characteristics that can be measured or observed to describe and identify a substance are called...
properties
A crayon was left in a hot car for several sunny days. Name two things that most likely happened to the crayon.
Melted and changed shape
Name two pieces of evidence we can use to see that a physical change has occurred.
Change in color, change in state, change in size or shape, dissolved in another substance.
Two substances, X and Y, react to make Substance Z. Substance X has a mass of 10g, and substance Y has a mass of 5g. The reaction takes place in a closes system (such as a sealed plastic bag). What is the mass of the new substance?
15g
Describe the particles of a liquid (their movement, how they take up space, etc.)
the particles of a liquid are somewhat spread out, can move more quickly than a solid, and flow past each other
Students are investigating a group of objects. They want to know which objects can conduct electricity. What do the students need for their investigation?
a light source and a circuit (battery, wires, etc.)
The candle itself is a solid, the melted wax dripping down from the top of the candle is a liquid, and the flame gives off certain gases.
Name two pieces of evidence we can use to see that a chemical change has occurred.
Change in color/odor, change in temperature, formation of bubbles/gas, Formation of a precipitate
A builder wants to make a bridge for toy cars using wooden planks. They test different types of wood to see which one bends or breaks with less weight. What property of the wood are they testing to find out which plank can hold the most weight?
Strength