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WGU C165 Objective Assessment Final 2025, Integrated Physical Sciences WGU, C165 Test Bank, WGU Science Questions and Answers, C165 Final Exam Prep, Physical Sciences Study Guide, WGU C165 Verified Answers
A cashier who has been handed a hundred-dollar bill may check its authenticity by holding it under a special lamp that emits electromagnetic radiation mostly at wavelengths slightly shorter than visible light. The electromagnetic radiation makes a pattern of previously invisible markings on the bill glow brightly, or fluoresce. Which kind of electromagnetic radiation does the lamp emit to produce this effect? - ANSWER-Ultraviolet radiation
After natural disasters, first responders can locate survivors in the rubble by using thermal detectors. Because the victims' bodies are warmer than their surroundings, the difference in temperature is detected by electromagnetic waves. Which part of the electromagnetic spectrum is being detected? - ANSWER- Infrared radiation
Airport security uses electromagnetic radiation to form images of objects inside passenger luggage. Which type of 1 / 4
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electromagnetic radiation is used in this way? - ANSWER-X- rays
Which type of wave has a longitudinal motion? - ANSWER- Sound waves
Which is a characteristic of electromagnetic waves? - ANSWER-Transverse wave motion
Electron - ANSWER-Subatomic particle is located outside the nucleus
What charge does a neutron have? - ANSWER-No charge
A chocolate chip cookie is made with dough and chocolate chips. Which type of substance is a chocolate chip cookie? - ANSWER-Mixture
Compound - ANSWER-A substance with sodium atoms bonded to chlorine atoms
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In which state of matter are particles close together, but able to slide past one another? - ANSWER-Liquid
Which change of state does the image show? - ANSWER-Solid to liquid
Which action demonstrates a chemical change? - ANSWER- Cooking an egg
Which type of bond is formed when valence electrons are shared between two atoms? - ANSWER-Covalent
{image: Periodic Table}
Which properties will elements in group 2 share, based on location in the periodic table? Choose 2 answers - ANSWER- Good thermal conductivity Good electrical conductivity
{image: Periodic Table}
Consider the location of sodium (Na) on the periodic table.Which element has chemical properties that are similar to sodium's? - ANSWER-Potassium (K) 3 / 4
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A beaker contains 500 g of liquid water. An ice cube with a mass of 5 g is added to the water in the beaker. How many grams of liquid water are in the beaker when the ice has melted? - ANSWER-505 g
A chemist places 250 grams of liquid water into a beaker. The volume of the liquid water is 250 milliliters. The chemist then freezes the water. After it is frozen, the ice has a volume of 273 milliliters. What is the mass of the ice? - ANSWER-250 grams
When baking soda is added to vinegar, a chemical reaction occurs. The reaction produces carbon dioxide gas, and a liquid solution consisting mostly of water and a salt called sodium acetate. How is mass affected in this reaction, according to the law of conservation of matter? - ANSWER-The total mass of baking soda and vinegar must equal the total mass of carbon dioxide and the liquid solution.
In which phase change is energy being absorbed from the surroundings? - ANSWER-Water boiling on an electric burner
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