New Mexico NM-ASR Science Grade 5 Practice Questions - New Mexico Assessment Of Science Readiness - Science, Grade 5 Exam

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A student places a small piece of chalk in a sealed glass jar. No chalk is added or removed. After several weeks the chalk looks slightly smaller. What can you conclude about the total amount of matter in the sealed jar?

It has stayed the same because the system is closed and matter is conserved It has decreased because the chalk got smaller It has increased because new dust formed inside the jar It cannot be measured without using a microscope

Correct Answer:

It has stayed the same because the system is closed and matter is conserved

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