(Question)
Q: What instrument is used to record the length and strength of an earthquake? Read this paragraph and choose the correct option from the provided answers: Earthquakes may take place every day near a volcano. But before an eruption the number and size of earthquakes increases. This is the result of magma pushing upward into the magma chamber. This motion causes stresses on neighboring rock to build up. Eventually the ground shakes. A continuous string of earthquakes may indicate that a volcano is about to erupt. Scientists use seismographs to record the length and strength of each earthquake. Choices: - transmitter - epicenter - microscope - seismograph A:
(Answer)
seismograph

(Question)
Q: What type of rock is a sandstone? Read this paragraph and choose the correct option from the provided answers: If you look up close, you would be able to see grains of sand. From this distance, you can see different layers from where the sand was laid down. This rock is sandstone. The sand grains are cemented together to make sandstone. Sandstone is a common type of sedimentary rock. Choices: - igneous rocks - landform rocks - limestone rocks - sedimentary rocks A:
(Answer)
sedimentary rocks

(Question)
Q: The units of time, day and year are based on what? Read this paragraph and choose the correct option from the provided answers: Choices: - motions of the sun - gravitational waves - moon phases - motions of earth A:
(Answer)
motions of earth