Ques: Q: What is a series of processes that remove unwanted substances from water called? Read this paragraph and choose the correct option from the provided answers: Water treatment is a series of processes that remove unwanted substances from water. The goal of water treatment is to make the water safe to return to the natural environment or to the human water supply. Treating water for other purposes may not include all the same steps. That's because water used in agriculture or industry may not have to be as clean as drinking water. Choices: - water filtration - water dilution - water cleaning - water treatment A:
Ans: water treatment

Ques: Q: The first photosynthetic organisms were not plants, but types of what that lived in the water? Read this paragraph and choose the correct option from the provided answers: The first photosynthetic organisms were bacteria that lived in the water. So, where did plants come from? Evidence shows that plants evolved from freshwater green algae, a protist ( Figure below ). The similarities between green algae and plants is one piece of evidence. They both have cellulose in their cell walls, and they share many of the same chemicals that give them color. So what separates green algae from green plants?. Choices: - pathogens - fungi - algae - bacteria A:
Ans: bacteria

Ques: Q: What force occurs whenever two surfaces come into contact? Read this paragraph and choose the correct option from the provided answers: Even if Laura didn't try to stop the skateboard, it would stop sooner or later. That's because there's also friction between the wheels and the pavement. Friction is a force that counters all kinds of motion. It occurs whenever two surfaces come into contact. Choices: - tension - vibration - gravity - friction A:
Ans: friction

Ques: Q: When a solvent with a gas dissolved in it is heated, the kinetic energy of both the solvent and solute _________? Read this paragraph and choose the correct option from the provided answers: Several substances HCl, NH 3 , and SO 2 have solubility that decreases as temperature increases. They are all gases at standard pressure. When a solvent with a gas dissolved in it is heated, the kinetic energy of both the solvent and solute increases. As the kinetic energy of the gaseous solute increases, its molecules have a greater tendency to escape the attraction of the solvent molecules and return to the gas phase. Therefore, the solubility of a gas decreases as the temperature increases. Choices: - evaporates - generates - decreases - increases A:
Ans:
increases