Physical or Chemical?
A student cuts a sheet of aluminum foil into several smaller pieces, which is this type of change.
What is physical?
A student changes the temperature of water to determine how temperature affects the time required for sugar to dissolve, meaning this is the independent variable.
What is the temperature of the water?
This instrument would be best for measuring 42 mL of water.
What is a graduated cylinder?
Convert 4.8 kg to grams.
What is 4800 g?
Density describes the amount of this quantity contained within a given volume.
What is mass/matter?
The prefix milli- represents this fraction of a base unit.
What is one-thousandth, or 0.001, or 1/1000?
A substance changes from a liquid to a gas when heated, which is this type of change.
What is physical?
In an experiment with water temperature being changed to test the time to dissolve sugar, this is the dependent variable.
What is the time required for the sugar to dissolve?
This instrument and unit would be appropriate for determining the mass of a small rock.
What is a scale and grams?
Convert 625 mL to liters.
What is 0.625 L?
A sample has a mass of 36 g and a volume of 12 mL, meaning it has this density.
What is 3.0 g/mL?
This is the order of 250 cm, 0.003 km, and 2.8 m from smallest to largest.
What is 250 cm, 2.8 m, and 0.003 km? (2.5 m, 2.8 m, and 3.0 m)
Two clear liquids are mixed and a solid suddenly forms in the container. This type of change has occurred.
What is chemical?
A student investigates whether the amount of water affects how quickly an antacid tablet dissolves, and these are two variables that should remain constant.
What are water temperature/type or size of the tablet/container/stirring method?
When reading water in a graduated cylinder, you should read this part of the meniscus (curved surface) at eye level.
What is the bottom?
Convert 2.75 km to centimeters.
What is 275000 cm?
A liquid has a density of 1.5 g/mL and a volume of 20 mL, meaning it has this mass.
What is 30 grams?
A student needs to measure exactly 27 mL of water. They pour the water into a beaker and look down at it from above, which gives these two problems with their measurement procedure.
What are he should have used a graduated cylinder and he should look at it from eye level?
A piece of iron develops a reddish-brown coating after being exposed to water and oxygen, which is this kind of change. (Give me an explanation)
What is chemical because color changed and a new substance formed?
In CER writing, this part should contain specific observations and measurements collected during an investigation.
What is E or evidence?
A pencil begins at 2.4 cm on a ruler and ends at 16.9 cm, meaning this is the pencil's length.
What is 14.5 cm?
Convert 10800 seconds to hours.
What is 3.0 hours?
A solid has a mass of 54 grams and a density of 6.0 g/cm3, meaning it has this volume
What is 9.0 cm3?
A student wants to determine whether heating a substance causes a physical or chemical change, and these are one quantitative and one qualitative observation the student could make.
What are mass or temperature for quantitative and color, state, gas production, or formation of a solid for qualitative formation?
A candle wick is lit and begins burning, and this type of change begins occurring.
What is chemical and physical?
A student writes, "The change was chemical because the substance changed". The student is missing this component of a CER.
What is evidence?
A graduated cylinder has markings every 2 mL. The bottom of the meniscus is halfway between the 36-mL and 38-mL marks, meaning this volume should be recorded.
What is 37 mL?
Convert 5.0 miles to kilometers using the provided conversions.
What is approximately 8.05 km?
Sample A has a mass of 20 g and a volume of 10 mL, while sample B has a mass of 50 g and a volume of 25 mL, meaning this is how their densities compare.
What is they are equal densities?
A sample has a mass of 0.075 kg and a volume of 25 mL. Calculate its density in g/mL.
What is 3.0 g/mL?