Blog

Hydroelectric power plants can generate huge amounts of electricity. Which of these statements best describes the impact of a hydroelectric power plant on the environment? (3 points)

The graph below shows the changes in the temperature of ice when it is heated from −20 °C to 100 °C. Based on the graph, which of these conclusions is correct? (2 points)

Which of these surface features are formed when the acid in groundwater reacts with limestone? (3 points)

Which of these questions can be answered using scientific methods? (2 points)

In ancient times, scientists believed that matter could be destroyed by burning or breaking. Modern scientists believe that matter cannot be destroyed. What best accounts for these different opinions? (2 points)

Two states of matter present in the water cycle are described below. State 1: Takes the shape of the part of the container which it occupies. State 2: Spreads across the entire volume of a container and takes its shape. Which of these statements is correct about the two states of matter? (3 points)

Tornadoes are formed due to the meeting of (3 points)

A volcanic eruption takes place in a location. Ash and gas are sent out into the air. Lava flows down the volcano into human habitation. Which Earth systems interact during this process? (3 points)

Which of these is a part of the biosphere? (2 points)

A theory is accepted by scientists when (2 points)