Science
This is a testable prediction that can be investigated through experiments.
This is a testable prediction that can be investigated through experiments.
What is magnesium?
Element, Compound, Homogeneous Mixture, or Heterogeneous Mixture
Element
Which state of matter has particles vibrating in fixed positions?
What is a solid?
What is the formula for density?
What is mass ÷ volume?
Burning coal
chemical change
A well-tested explanation of natural phenomena, supported by evidence, is called this.
What is a scientific theory?
What is Koolaid?
Element, Compound, Homogeneous Mixture, or Heterogeneous Mixture
Homogeneous Mixture
According to KMT, temperature is directly proportional to this property of particles.
What is kinetic energy?
A block has a mass of 30 g and a volume of 10 mL. What is its density?
What is 3 g/mL?
Melting Ice
Physical Change
In the scientific method, this step comes right before conducting an experiment.
What is forming a hypothesis?
What is taco soup?
Element, Compound, Homogeneous Mixture, or Heterogeneous Mixture
Heterogeneous Mixture
Why can gases be compressed more easily than solids or liquids?
Because gas particles have large amounts of empty space between them.
Which is an intensive property: density or mass?
What is density?
Sour Taste
Explain the difference between a hypothesis and a theory using one example.
A hypothesis is a specific prediction (e.g., “If plants get more sunlight, they will grow taller”), while a theory explains why phenomena happen (e.g., the theory of photosynthesis explains how plants convert sunlight into energy).
What is K2O (potassium Oxide)?
Element, Compound, Homogeneous Mixture, or Heterogeneous Mixture
Compound
Arrange the following in order of increasing particle motion: liquid, solid, gas.
What is solid → liquid → gas?
A student drops a rock into a graduated cylinder. The water level rises from 25.0 mL to 40.5 mL. If the rock’s mass is 38.0 g, what is its density?
38.0 g ÷ 15.5 mL = 2.45 g/mL
Oxidizes (rusts) in the presence of oxygen
Chemical Property
A student tests how the amount of fertilizer affects plant growth. Identify the independent variable and the dependent variable, and explain why.
The independent variable is the amount of fertilizer (because it is what is changed). The dependent variable is the plant growth (because it is what is measured in response).
Describe how the properties of an compound relate to the properties of the elements that make it up.
What about the properties of a mixture from the substances that make it up.?
The properties of a compound are different from the properties of the elements it is made of. The substances in a mixture retain their properties.
According to the kinetic molecular theory, what happens to particle motion when the temperature of a substance doubles?
The particles move faster because their average kinetic energy increases.
A student measures a mass of 154.2 g for a sample. The volume, measured by displacement, is 12.7 mL. Calculate the density and report with the correct number of significant figures.
154.2 g ÷ 12.7 mL = 12.1 g/mL
baking
chemical change