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WorksheetsHunger Games - 8th Grade Science (Task #1)
Total questions: 10
Worksheet time: 50mins
Jeffery created a model to show how particles in a solid, liquid, and gas move when exposed to changes in temperature. Which label should Jeffery use to correctly identify what is happening in his model?
When you get hot, either from hot weather or from exercise, you sweat. Sweating has the effect of cooling off your body. How does this cooling effect happen?
The salt in your sweat changes to a liquid and carries the heat to the air.
The liquid sweat evaporates, and heat is transferred into the air.
The liquid sweat coats your skin, and the heat moves from the sweat to the air.
Your skin automatically causes the liquid sweat to flow off your body, carrying the heat to the air.
Water is commonly found in the state of matter pictured. Which model BEST represents the state of matter in the picture of water?
Which particle is represented by the atomic model?
an atom of calcium
an isotope of calcium
an atom of potassium
an isotope of potassium
Thermal energy is applied to a gas. What will happen to the gas molecules in the container as thermal energy is applied?
The movement, kinetic energy, and pressure of the molecules will increase.
The movement, kinetic energy, and pressure of the molecules will decrease.
The movement, kinetic energy, and pressure of the molecules will stay the same.
The movement of the molecules will increase, but the kinetic energy and pressure of the molecules will stay the same.
Using the excerpt from the periodic table, which statement MOST accurately explains the chemical behavior of a pair of elements?
Boron and Carbon have similar chemical behavior because their atomic numbers are about the same.
Boron and Aluminum have similar chemical behavior because they belong to the same group on the periodic table.
Nitrogen and Oxygen have similar chemical behavior because both are gases.
Nitrogen and Oxygen have similar chemical behavior because they can react easily to form nitrogen dioxide.
Which process would result in a heterogeneous mixture?
boiling salt water to evaporate the water
missing together powdered lemonade mix and water
opening a can of carbonated soda so that bubbles form
pouring orange juice through a filter to remove the pulp
Four students in Mr. McMann’s class carry out investigations of the chemical and physical properties of an unknown substance. They list their observations. Which student sorted the properties into the correct categories?
John
Ava
Marsha
Carlos
Sulfur’s atomic number is 16. Which diagram correctly models the distribution of electrons in a sulfur atom?
Heather mixes two white liquids together. Immediately, a gray liquid forms. How is the gray liquid related to the white liquids?
There is no relationship between the gray liquid and white liquids.
The gray liquid was released from inside the atoms of the white liquids.
The gray liquid is made up of the same kinds of atoms as the white liquids, but the atoms are arranged differently.
The gray liquid is made up of the same kinds of molecules as the white liquids, but the molecules are a different color.
