Iron has a higher density than rubber, meaning that it's weight or mass will be greater even if it's the same size. Standard units are used to measure and describe physical quantities such as weight, time, temperature, and volume.

The answer is "-30 degrees Fahrenheit"

Standard units are used to measure and describe physical quantities such as weight, time, temperature, and volume. The standard unit for temperature is degrees Fahrenheit. Volume is measured in Liters, weight in pounds, and time is measured in minutes, seconds, or hours.

The answer is liquid number 2. Density is a measure of the amount of "stuff" in a given volume. More dense objects sink and less dense objects float.

The answer is 45 because there are 10 millimeters in a centimeter and the ruler is measuring 4.5 centimeters.

The answer is "at number 3" because you measure volume at the meniscus.

This data table provides observations and measurements of two mystery samples. Properties of materials can be used to determine what objects are or the qualities of them. In this case, we are looking for the property that would allude to these samples being solids instead of liquids, and that property is the shape of the samples. Liquids or solids can be measured for mass and volume and described by color, but cannot be characterized by shape. Liquids take the form of the container that they are in, whereas solids maintain a specific shape. These samples are solids because they are a cube and pyramid.

This data table lists what each student observed when they were looking at their material. Some of the properties that describe this material can be gathered through observation, while others are through measurement. In this case, what type of matter the student is looking at comes down to the shape. A gas, liquid, or solid can be any color, mass, or volume, so those characteristics are less helpful in identifying what these materials are. Gases have no shape, liquids take the form of the containers they are in, and solids have a definite figure. Mildred and Dolly look at solids because the material is described as a pyramid and a sphere, which are definite shapes. Edmund and Betsy look at materials with no shape, which means they are gas or liquid, so the only answer choice that matches is "Betsy observed a liquid.".

The statement "The physical properties of matter can only be gathered through measuring." is false. The physical properties of matter can be gathered through measurement AND observation. Using the five senses to collect information about the material or matter is just as crucial as taking concrete measures like the mass or volume.  Classification and categorization of material are best done through a combination of observation and measurement.

All of the physical properties listed below can be determined through measurement. A material's freezing point can be determined by keeping track of the temperature the material is exposed to colder and colder temperatures until it freezes. The temperature this happens is decided after multiple trials determine its freezing point. A material's boiling point is discovered by measuring a rising temperature until the material comes to a rolling boil. Both of these physical properties are measured with a thermometer. Finally, whether a material conducts electricity depends on what the sample is made up of. Things like wood, plastic, and cloth do not conduct electricity well, while metal and copper do. The electrical conductivity can be calculated by measuring the resistance, area, and length of the test material. You can also use a four-terminal ohmmeter for greater accuracy.

The statement "Texture is a physical property that is determined through measurement." is false. Texture cannot be measured with a tool but is a physical property that is gathered using one of the five senses. Our sense of touch allows us to feel materials and make determinations about what we are observing. We would not use a ruler or thermometer to determine a material's texture.