ALV Scientia Revyoo

1. Explanations of well-established scientific facts are subject to change over time. Which description of science best explains this phenomenon?

• Factual

• Limited

• Tentative

• Understandable

During the COVID-19 pandemic, swab tests are used to test for the presence of the virus. Which domain of science best supports this practice? Science as a way of…

• doing

• looking

• knowing

• criticizing

What is the difference between observation and inference?

• An observation is a guess; an inference is a fact.

• An observation is always correct; an inference is always wrong.

• An observation is what you gather using your senses; an inference is drawn from observations combined with logic and prior knowledge.

• None of the above.

Which statement defines measurement?

•  It describes observable characteristics.

•  It is estimating quantities using basic tools.

• It is the comparison of physical quantities without numerical values.

• It is expressed as a combination of a numerical value and a unit of a physical quantity,

T/F.  In an experiment, your colorless chemical turned green. Based on this, you immediately concluded that a new substance was formed. Your conclusion accurately represents a direct observation rather than an inference.

• True

• False

An observation is something you see, while an inference is what you think about what you see.

• True

• False

T/F. The largest measurement reading that can be obtained from an instrument indicates its precision.

• True

• False

Winnie the Pooh needs 500 g of honey for his experiment. In the second collection, the following masses were obtained: 492 g, 493 g, 493 g, and 493 g. How would you describe his measurements?

• Accurate only

• Precise only

• Both Accurate and Precise

• Neither Accurate nor Precise

What is the precision of the instrument?

• 5.25 cm

• 5.2 cm

• 1 cm

• 8 cm

Using the triple beam balance, up to what place value can be read with CERTAINTY?

• tenths

• ones

• tens

• hundreds