Underline the gerunds or gerund phrases in each sentence. Coloring is a popular activity with most children.

Find the mass of $^{239} \mathrm{Pu}$ that has an activity of $1.00\ \mu \mathrm{Ci}.$

The activity format calls for three categories on the statement of cash flows. Define each category

How would you change the equation in the Explore Activity to model -3x + 4 = 5?

Find the mass of ${ }^{239} \mathrm{Pu}$ that has an activity of $1.00 \mu \mathrm{Ci}$.

Provide two examples of Canadian lakes that were formed by glacier activity and describe the process.

Ascertain the gerund below and tell how it is used in the sentence.

Her favorite activity was cooking.

How would you change the equation in the Explore Activity to model -3x+4=5?

Identify the gerund below and tell how it is used in the sentence.

Her favorite activity was cooking.

(a) Why does a $^{99 \mathrm{m}} \mathrm{Tc}$ generator need to be shipped once a week to hospitals? (b) What is the activity of a $10^{11}-\mathrm{Bq}^{99 \mathrm{m}} \mathrm{Tc}$ generator source 9 days after it was produced?(c) If the activity is $0.9 \times 10^{11} \mathrm{Bq}$ on Monday morning when it arrives, what will be the activity at the same time on Friday morning, the last day of the working week?

A sphere is a three-dimensional figure with all points ________________ from the center. Explore the earlier activity.

Identify some possible consequences if volcanic activity on Earth were to slow down or stop .

Many smoke detectors use small quantities of the isotope ${ }^{241} \mathrm{Am}$ in their operation. The half-life of ${ }^{241} \mathrm{Am}$ is $432 \mathrm{yr}$. How long will it take for the activity of this material to decrease to $1.00 \times 10^{-3}$ of the original activity?

Which of the following decreases brain activity? A. nicotine, B. amphetamines, C. cocaine, D. alcohol.