Changes in Matter
What is a physical change?
What is a change in shape, size, or state where the substance stays the same?
This property describes how much matter is in an object.
What is mass?
A book falls from a desk to the floor. What force is responsible for this motion?
What is gravity?
What causes the pattern of day and night on Earth?
What is Earth's rotation?
A student records how far a toy car travels on different surfaces. What surface will most likely result in the shortest distance?
What is carpet (highest friction)?
Give one example of a chemical change.
What is rusting, burning, cooking, etc.
What is matter?
What is anything that has mass and takes up space?
What force slows things down when they rub together?
What is friction?
A student observes that different parts of Earth receieve varying amounts of sunlight during the year. What is the main cause of this pattern?
What is Earth's tilt on its axis as it revolves around the Sun?
A student dissolved sugar in water. Is this a physical or chemical change? Explain.
What is a physical change?
Explain the difference between physical and chemical changes.
What is chemical changes form new substances and physical changes alter the appearance or state?
When baking soda and vinegar react in an open cup, the mass often appears to decrease because this state of matter escaped into the air.
What is Gas?
Which situation best demonstrates balanced forces?
What is an object not moving or moving at a constant speed?
A student notices that at the same time each day, shadows are longer in the winter and shorter in the summer.
What is the MAIN cause of this pattern?
What is Earth’s tilt changing the angle of sunlight?
A student notices a substance bubbling, changing color, and producing heat. What conclusion is best supported by these observations?
What is a chemical change occurred?
A student observes a substance changing color and producing heat. What conclusion should the student make?
What is a chemical change has occurred?
A student attaches a balloon filled with 5g of baking soda to a cup containing 100g of vinegar. After the reaction, the balloon inflates and the total mass of the setup is measured. The scale will read exactly this much.
What is 105 grams?
A student pushes a box across the carpet and then across the tile. The box moves farther on tile. What explains this difference?
What is less friction on tile?
Why do locations near the equator experience less seasonal change than locations near the poles?
What is they receive more consistent sunlight year-round?
A model shows Earth tilted as it revolves around the sun. What question would the model best help answer?
What is why seasons occur?
A student claims dissolving sugar in water is a chemical change. Use evidence to evaluate this claim.
What is a physical change, because no new substance has formed?
An iron nail is left outside and develops rust, which is a combination of iron and oxygen. Because the oxygen came from the air and added to the nail, the mass of the rusty nail will be [higher/lower/same] than the original nail.
What is Higher?
A student increases the force used to push a cart. How will this most likely affect the cart's motion?
What is it will move faster/farther, because greater force increases motion?
A student observes different constellations at different times of the year.
What is the BEST explanation for this pattern?
What is Earth’s revolution around the Sun changes our view of space?
A student places two objects of equal size in water. One sinks and one floats. The student also notices that the sinking object is not attracted to a magnet.
Which property BEST explains why the object sinks?
What is density?