When nitrogen is returned to the soil when dead plants decompose is an interaction that occurs in what system?

• biosphere and atmosphere

• biosphere and geosphere

• geosphere and atmosphere

• atmosphere and geosphere

During the 1800’s, miners can identify real gold from pyrite through biting the surface of the mineral. If a bite mark is exhibited, then the said mineral is considered real gold. What property is tested in this scenario?

• cleavage

• luster

• hardness

• streak color

A student obtained a cup of quartz sand from a beach. A saltwater solution is poured into the sand and is allowed to evaporate. Afterwards, the mineral residue from salt water solution cemented the sand grains together. Which of the following is most likely formed?

• extrusive igneous rock

• intrusive igneous rock

• metamorphic rock

• sedimentary rock

Which of the following human activities may NOT result to the movement of sediments from one place to another?

• building a highway

• washing the dishes

• developing new athletic field

• cultivating soil and gardening

What refers to the shaking of the surface of the Earth resulting from a sudden release of energy caused by a convection current?

• earthquake

• hurricane

• storm surge

• volcanic eruption

Samer is walking down the river when she sees an unknown metamorphic rock. Which of the following characteristic can BEST help her to immediately identify the type of metamorphism that the rock underwent using a magnifying glass?

• foliation

• grain size

• name of the rock

• kind of mineral present in the rock

What body parts are made of tissues that can contract and then relax back to normal size?

• Bones

• Cartilage

• Muscles

• Tendons

Which among the choices below is used for improving health condition by producing vaccines and pharmaceuticals?

• cloning

• gene splicing

• selective breeding

• recombinant DNA technology

What is the connection between biotic potential and environmental resistance?

• Biotic potential increases the population while environmental resistance decreases its growth

• Biotic potential increases the population whereas environmental resistance confines its growth

• Biotic potential and environmental resistance are the two factors that increase the population growth

• Biotic potential and environmental resistance are the two factors that limit the population explosion.

Which of the following is an example of the endocrine system directly interacting with the nervous system?

• Hormones provide feedback that affect neuron processing

• The brain sends signal that control the speed at which food moves through the intestines

• vertebrae protect the spinal cord from injury

• Sensory receptors in bones send signals about body position to the brain.